amlodipine reference
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(amlodipine · DailyMed)
Registered Tanzania · TMDA

KARDAM 5

Amlodipine Besilate 5 mg/6 mL,Anhydrous Calcium Hydrogen Phosphate 36.0000 mg/6 mL,Magnesium Stearate 1.800 mg/6 mL,Microcrystalline Cellulose ( Avicel PH 112 ) 113.6652 mg/6 mL,Microcrystalline cellulose (pharmacel 101) 18.000 mg/6 mL,Sodium Starch Glycolate Type A 3.600 mg/6 mL

TAN 21 HM 0416 Tablets cardiovascular system INN generic

What it does

Amlodipine is a medicine that helps lower blood pressure and improve blood flow by relaxing the blood vessels.

Commonly used for: high blood pressure (hypertension), chest pain (angina)

Read more in plain English ↓

Plain-language summary for general understanding - not medical advice. Always follow your pharmacist/doctor.

Ask about this medicine

Answers come only from this medicine's registration record, BNF monograph and interaction data - not medical advice.

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Sourcing - Kenya only

Registration & product details

Registration no.
TAN 21 HM 0416
Registration date
2021-10-09
Expiry date
2026-10-08
Status
Registered/Compliant
Active ingredient
Amlodipine Besilate 5 mg/6 mL,Anhydrous Calcium Hydrogen Phosphate 36.0000 mg/6 mL,Magnesium Stearate 1.800 mg/6 mL,Microcrystalline Cellulose ( Avicel PH 112 ) 113.6652 mg/6 mL,Microcrystalline cellulose (pharmacel 101) 18.000 mg/6 mL,Sodium Starch Glycolate Type A 3.600 mg/6 mL
Dosage form
Tablets
Strength
-
Pack size
-
Therapeutic class
-
ATC class (WHO)
C09XA - Renin-inhibitors
RxNorm RxCUI
17767
Manufacturer / MAH
Aurobindo Pharma
Applicant / LTR
Aurobindo Pharma Limited
Country of origin
INDIA
Manufacturer location
Lankelapalem - Simhadri NTPC Power Plant Rd, Donkada, Lemarthi Agraharam, Andhra Pradesh 531019, India

Source: Tanzania Medicines and Medical Devices Authority · fetched 2026-03-11 23:53:05 · updated 2026-10-08 03:00:44

Drug Interactions

23
Check interactions

Pharmacodynamic Warnings

Amlodipine appears in TABLE 8: Drugs that cause hypotension

Severe (1)

Amlodipine - increases exposure

Grapefruit juice very slightly increases the exposure to amlodipine. Avoid.

Severe Study

Moderate (18)

Amlodipine - decreases exposure

Enzalutamide is predicted to decrease the exposure to calcium channel blockers (amlodipine, felodipine, lacidipine, lercanidipine, nicardipine, nifedipine, nimodipine). Monitor and adjust dose.

Moderate Study

Amlodipine - decreases exposure

Apalutamide is predicted to decrease the exposure to calcium channel blockers (amlodipine, felodipine, lacidipine, lercanidipine, nicardipine, nimodipine). Monitor and adjust dose.

Moderate Study

Amlodipine - increases exposure

Dronedarone is predicted to increase the exposure to calcium channel blockers (amlodipine, felodipine, lacidipine, lercanidipine, nicardipine, nifedipine, nimodipine). Monitor and adjust dose.

Moderate Study

Amlodipine - increases exposure

Antifungals, azoles (fluconazole, isavuconazole, posaconazole) are predicted to increase the exposure to calcium channel blockers (amlodipine, felodipine, lacidipine, lercanidipine, nicardipine, nifed

Moderate Study

Amlodipine - increases exposure

Miconazole is predicted to increase the exposure to calcium channel blockers (amlodipine, felodipine, lacidipine, lercanidipine, nicardipine, nifedipine, nimodipine, verapamil). Use with caution and a

Moderate Theoretical

Unknown (4)

Amlodipine - increases risk of hypotension

Intravenous magnesium potentially increases the risk of hypotension when given with calcium channel blockers (amlodipine, felodipine, lacidipine, lercanidipine, nicardipine, nifedipine, nimodipine, ve

Unknown Anecdotal

Amlodipine - increases risk of angioedema

Temsirolimusispredictedtoincreasetheriskofangioedema whengivenwithcalciumchannelblockers(amlodipine, felodipine,lacidipine,lercanidipine,nicardipine,nifedipine, nimodipine).oTheoretical https://www.fa

Unknown Theoretical

Simvastatin - increases exposure

Amlodipine slightly increases the exposure to statins (simvastatin). Adjust simvastatin dose, p. 224.

Unknown Study

Statins - increases exposure

Amlodipine slightly increases the exposure to statins (simvastatin). Adjust simvastatin dose, p. 224.

Unknown Study

Data from BNF 85 (British National Formulary). This is not a substitute for professional medical advice. Matched via: exact

Disclaimer: This information is sourced from Tanzania Medicines and Medical Devices Authority (Tanzania). Always consult a qualified healthcare professional before using any medication.

About amlodipine

Amlodipine is a medicine that helps lower blood pressure and improve blood flow by relaxing the blood vessels.

What it treats

  • high blood pressure (hypertension)
  • chest pain (angina)

How it works

It works by blocking calcium from entering the cells of the heart and blood vessels, which helps to relax and widen them.

Who it's for

Amlodipine is for adults who need help managing high blood pressure or chest pain.

Drug class

Calcium channel blockers

Cautions

  • • Be careful if you are taking other medications that lower blood pressure.

AI-assisted summary grounded in BNF data - general information only, not medical advice. Always confirm with your pharmacist or doctor.

About cellulose

Cellulose is a type of fiber that helps with digestion and promotes bowel health.

What it treats

  • constipation
  • irregular bowel movements

How it works

Cellulose adds bulk to the stool, making it easier to pass through the intestines.

Who it's for

Suitable for people looking to improve their digestive health.

AI-assisted summary grounded in BNF data - general information only, not medical advice. Always confirm with your pharmacist or doctor.

About glycolate

Glycolate is a compound that may be used in various medical treatments.

How it works

Glycolate works by interacting with certain bodily processes, though specific details are not available.

Who it's for

Glycolate may be suitable for individuals needing treatment related to certain health conditions, but specific indications are not provided.

AI-assisted summary grounded in BNF data - general information only, not medical advice. Always confirm with your pharmacist or doctor.

About hydrogen

Hydrogen is a chemical element often used in various applications but is not a conventional medicine. It is important to understand its uses and safety.

How it works

Hydrogen is a basic element and does not have a direct medicinal effect like traditional drugs. Its properties are utilized in various scientific and industrial processes.

Who it's for

Hydrogen is not prescribed for specific medical conditions as it is not classified as a medicine.

AI-assisted summary grounded in BNF data - general information only, not medical advice. Always confirm with your pharmacist or doctor.

About microcrystalline

Microcrystalline is a type of substance often used in medicines to help with various health issues. It is commonly used as a filler or binder in tablets and capsules.

What it treats

  • stomach issues
  • constipation
  • weight management

How it works

It helps to improve the texture of medicines and can assist in the absorption of other ingredients in the body.

Who it's for

Adults and children who need help with specific health conditions, as directed by a healthcare professional.

AI-assisted summary grounded in BNF data - general information only, not medical advice. Always confirm with your pharmacist or doctor.

About starch

Starch is a carbohydrate that serves as a source of energy and is often used in various food products.

What it treats

  • energy source
  • dietary supplement

How it works

Starch is broken down by the body into glucose, which provides energy for daily activities.

Who it's for

Starch can be used by anyone needing extra energy in their diet, particularly those with increased energy needs.

AI-assisted summary grounded in BNF data - general information only, not medical advice. Always confirm with your pharmacist or doctor.

Clinical monograph: Amlodipine

BNF-referenced

Amlodipine is a dihydropyridine calcium channel blocker primarily used for the treatment of hypertension and angina. It works by relaxing blood vessels, which lowers blood pressure and improves blood flow to the heart.

Indications

  • Hypertension
  • Angina

Dosage

Children: Children 1 month to 11 years: Initially 100–200 micrograms/kg once daily; increased if necessary at intervals of 1–2 weeks up to a maximum of 5 mg once daily.

Adults: Initially, 5 mg once daily, increased if necessary to a maximum of 10 mg once daily.

Mechanism of action

Amlodipine inhibits the influx of calcium ions into vascular smooth muscle and cardiac muscle cells, leading to vasodilation and decreased myocardial oxygen demand.

Pharmacodynamics

Amlodipine causes a reduction in systemic vascular resistance and arterial pressure, resulting in decreased workload on the heart. It has a long duration of action due to its slow onset and prolonged effects.

Pharmacokinetics

Amlodipine is well absorbed orally, with peak plasma concentrations occurring 6-12 hours after administration. It has a half-life of approximately 30-50 hours, allowing for once-daily dosing. It is extensively metabolized in the liver and excreted primarily in the urine.

Contra-indications

  • Cardiogenic shock
  • Aortic stenosis

Adverse effects

  • Asthenia
  • Constipation
  • Diarrhoea
  • Drowsiness
  • Dyspnoea
  • Gastrointestinal disturbances

Interactions

  • Grapefruit juice (severe increase in exposure)
  • Enzalutamide (moderate decrease in exposure)
  • Apalutamide (moderate decrease in exposure)
  • Dronedarone (moderate increase in exposure)
  • Antifungals (azoles) (moderate increase in exposure)
  • Miconazole (moderate increase in exposure)
  • Cobicistat (moderate increase in exposure)
  • Crizotinib (moderate increase in exposure)
  • Dabrafenib (moderate decrease in exposure)
  • Idelalisib (moderate increase in exposure)

Precautions

  • Caution in hepatic impairment (risk of increased exposure)
  • Monitor for sudden withdrawal effects, which may exacerbate myocardial ischaemia

Pregnancy

Manufacturer advises caution due to limited data on safety.

Breast-feeding

Manufacturer advises to avoid; no information available.

Storage

Store at room temperature, away from moisture and heat.

Formulations

  • Amlodipine 5mg/5ml oral solution (sugar-free)
  • Amlodipine 10mg/5ml oral solution (sugar-free)
  • Amlodipine 5 mg tablets
  • Amlodipine 10 mg tablets
BNF for Children 2019-2020 p.132 PubChem / pathway

AI-synthesized from BNF references - general information only, not a substitute for professional medical advice or the current BNF. Verify doses with a pharmacist.

Clinical monograph: cellulose

Cellulose is a complex carbohydrate and a key structural component of the plant cell wall. It is an indigestible polysaccharide made up of linear chains of glucose molecules linked by β-1,4-glycosidic bonds. As a dietary fiber, cellulose contributes to digestive health by promoting bowel regularity and is commonly used as a laxative and bulking agent in various food products and pharmaceuticals.

Indications

  • Constipation
  • Dietary fiber supplementation
  • Irritable bowel syndrome
  • Diverticular disease
  • Weight management

Dosage

Children: Refer to appropriate guidelines for specific dosage; generally taken with adequate fluid intake.

Adults: Refer to appropriate guidelines for specific dosage; generally taken with adequate fluid intake.

Mechanism of action

Cellulose acts primarily as a bulk-forming laxative. It absorbs water in the intestines, which increases stool bulk and stimulates peristalsis, thus facilitating bowel movements. Additionally, cellulose is not digestible by human enzymes, leading to fermentation by gut bacteria, which may enhance gut health and alter gut microbiota composition.

Pharmacodynamics

Cellulose increases stool weight and frequency of bowel movements. It works by retaining water in the intestines, leading to softer stools and improved passage through the gastrointestinal tract. The bulking effect of cellulose can help alleviate constipation and promote overall digestive health. It may also play a role in cholesterol reduction and glycemic control through its effects on digestion and absorption of nutrients.

Pharmacokinetics

Cellulose is not absorbed into the bloodstream due to its indigestible nature. Instead, it passes through the gastrointestinal tract, where it adds bulk to the stool. Its fermentation by colonic bacteria produces short-chain fatty acids, which may have beneficial effects on colon health. The onset of action for cellulose as a laxative can vary but is generally within 24 to 72 hours after ingestion.

Adverse effects

  • Bloating
  • Flatulence
  • Diarrhea
  • Abdominal discomfort

Precautions

  • Use with caution in patients with a history of gastrointestinal disorders.
  • Monitor for potential allergic reactions in sensitive individuals.

Pregnancy

Cellulose is generally considered safe during pregnancy as it is a non-toxic, indigestible fiber.

Breast-feeding

Cellulose is also considered safe during breastfeeding; it is excreted in breast milk in negligible amounts.

Storage

Store in a cool, dry place away from direct sunlight.

Formulations

  • Powder
  • Capsules
  • Tablets
  • Granules

AI-synthesized from BNF references - general information only, not a substitute for professional medical advice or the current BNF. Verify doses with a pharmacist.

Clinical monograph: glycolate

BNF-referenced

Glycolate is an intermediate in the metabolism of ethylene glycol, a compound that can cause toxicity when ingested. The toxicity arises primarily from its conversion to glycolic acid and other harmful metabolites. Glycolate and its relation to ethylene glycol's elimination kinetics have been studied, revealing important insights into their toxicokinetics in animal models.

Dosage

Children: Refer to specific clinical guidelines for dosing in children, as no standard paediatric dosage is specified in the provided resources.

Adults: Refer to specific clinical guidelines for dosing, as no standard adult dosage is specified in the provided resources.

Mechanism of action

Ethylene glycol toxicity results from its metabolism to glycolic acid and other toxic metabolites. Glycolate accumulates in the body and is eliminated more slowly than ethylene glycol itself. The renal excretion of both compounds plays a crucial role in their elimination, accounting for a significant portion of the administered dose.

Pharmacodynamics

The pharmacodynamics of glycolate are closely tied to its role as a metabolite of ethylene glycol. Its accumulation can lead to metabolic acidosis, although minimal clinical effects have been observed at low doses. The relationship between glycolate and ethylene glycol indicates that glycolate may contribute to the overall toxic effects of ethylene glycol ingestion.

Pharmacokinetics

The pharmacokinetics of glycolate indicate that it reaches peak plasma levels between 4-6 hours after the administration of ethylene glycol. The elimination half-life of ethylene glycol is approximately 1.7 hours in rats and 3.4 hours in dogs. Glycolate is predominantly eliminated through renal excretion, with about 5% of the dose being excreted unchanged.

Pregnancy

There is limited data on the safety of glycolate in pregnancy. Caution is advised.

Breast-feeding

Data on the excretion of glycolate in human milk is not available. Caution is advised.

Storage

Store at room temperature, away from light and moisture.

AI-synthesized from BNF references - general information only, not a substitute for professional medical advice or the current BNF. Verify doses with a pharmacist.

Clinical monograph: hydrogen

BNF-referenced

Hydrogen (H2) is a colorless, odorless gas that has garnered significant interest for its potential therapeutic effects, particularly due to its antioxidant and anti-inflammatory properties. Research suggests that hydrogen-rich water may have beneficial effects on vascular health and could serve as an anti-aging agent by reducing oxidative stress and inflammation in endothelial cells. Its mechanism of action involves the activation of the Nrf2 pathway, which contributes to the protective effects against cellular senescence and other forms of oxidative damage.

Indications

  • Oxidative stress-related conditions
  • Inflammatory conditions
  • Potential anti-aging applications
  • Vascular health enhancement

Dosage

Children: Refer to specific product formulations and guidelines, as dosing can vary based on the concentration of hydrogen in the product used.

Adults: Refer to specific product formulations and guidelines, as dosing can vary based on the concentration of hydrogen in the product used.

Mechanism of action

Molecular hydrogen acts primarily as an antioxidant and anti-inflammatory agent. It is believed to exert its beneficial effects through the activation of the Nrf2 pathway, which enhances the expression of antioxidant enzymes and protects cells from oxidative stress. Hydrogen-rich environments have been shown to mitigate the harmful effects of various toxins on human umbilical vein endothelial cells, thereby promoting vascular health and longevity.

Pharmacodynamics

Hydrogen's pharmacodynamic properties are linked to its role as a potent antioxidant, which reduces reactive oxygen species (ROS) and modulates inflammation. It has been documented to counteract cellular senescence in endothelial cells, thereby maintaining vascular integrity and promoting overall health. The long-lasting effects of hydrogen exposure can be observed even after its concentration in the medium has decreased, suggesting a sustained activation of protective cellular pathways.

Pharmacokinetics

Hydrogen is a gaseous molecule that diffuses rapidly across biological membranes. Its absorption and distribution in the body are influenced by the method of administration, with hydrogen-rich water being a common delivery form. Once in the bloodstream, hydrogen is quickly utilized by tissues, and its concentration diminishes rapidly, with a half-life that can vary based on conditions. The elimination of hydrogen primarily occurs via exhalation, making it a non-toxic molecule with a favorable safety profile.

Pregnancy

Hydrogen is generally considered safe during pregnancy, but it is advisable to consult a healthcare provider for specific recommendations.

Breast-feeding

Hydrogen is considered safe during breastfeeding, but as with any substance, it is recommended to discuss with a healthcare provider.

Storage

Hydrogen should be stored in a cool, dry place away from direct sunlight and heat sources, in appropriate gas cylinders designed for compressed gases.

Formulations

  • Hydrogen gas (H2)
  • Hydrogen-rich water

AI-synthesized from BNF references - general information only, not a substitute for professional medical advice or the current BNF. Verify doses with a pharmacist.

Clinical monograph: hydrogenphosphate

BNF-referenced

Hydrogenphosphate (HPO4^2-) is an inorganic phosphate compound that plays a crucial role in various biological processes, including energy metabolism and cellular signaling. It is a key component in the formation of nucleotides, nucleic acids, and phospholipids, and is essential for ATP production and cellular energy transfer.

Mechanism of action

Hydrogenphosphate acts as a substrate for various enzymatic reactions where phosphate groups are transferred or incorporated into organic molecules. It is involved in metabolic pathways such as nicotine biosynthesis and NAD/NADH cycling, facilitating biochemical reactions that are vital for cellular function.

Pharmacodynamics

Hydrogenphosphate is crucial for maintaining cellular homeostasis. It regulates acid-base balance and is involved in energy metabolism. The phosphate groups it provides are integral to the structure and function of ATP, which is the primary energy currency of the cell. Additionally, hydrogenphosphate influences signal transduction pathways through phosphorylation and dephosphorylation processes.

Pharmacokinetics

Hydrogenphosphate is readily absorbed in the gastrointestinal tract and distributed throughout the body. Its elimination primarily occurs through renal excretion, where it is filtered and reabsorbed by the kidneys. The balance of hydrogenphosphate levels is tightly regulated by various physiological mechanisms to ensure proper metabolic function.

Pregnancy

There is limited information regarding the safety of hydrogenphosphate in pregnancy. Consult relevant guidelines and consider potential risks versus benefits.

Breast-feeding

Data on the excretion of hydrogenphosphate in human milk are not available. Caution is advised.

Storage

Store in a cool, dry place away from direct sunlight. Ensure containers are tightly closed.

AI-synthesized from BNF references - general information only, not a substitute for professional medical advice or the current BNF. Verify doses with a pharmacist.

Clinical monograph: microcrystalline

Microcrystalline cellulose is a refined wood pulp, commonly used as an excipient in pharmaceutical formulations. It serves as a bulking agent and stabilizer in tablets and capsules, improving the physical properties of the drug formulation. It is characterized by its ability to absorb moisture and provide a suitable texture for various dosage forms.

Indications

  • Used as an excipient in tablet formulations
  • Used as a bulking agent in capsule formulations
  • Used in food products as a thickener or stabilizer

Dosage

Children: Refer to specific product guidelines as dosage will depend on the formulation and the active ingredients.

Adults: Refer to specific product guidelines as dosage will depend on the formulation and the active ingredients.

Mechanism of action

Microcrystalline cellulose acts as a non-digestible filler that enhances the flow properties of powders during the manufacturing of tablets and capsules. It does not have a direct pharmacological action on the body but ensures that the active ingredients are effectively delivered to the patient.

Pharmacodynamics

As a non-active ingredient, microcrystalline cellulose does not exert pharmacodynamic effects typical of active pharmaceutical ingredients. Its primary role is to provide a stable and consistent matrix for the drug, facilitating the release of the active compound once ingested.

Pharmacokinetics

Microcrystalline cellulose is not absorbed in the gastrointestinal tract; it passes through the digestive system largely unchanged. It adds bulk to the stool, which may aid in promoting regular bowel movements. The substance is excreted in feces, where it contributes to dietary fiber intake.

Pregnancy

Data regarding the use of microcrystalline cellulose during pregnancy is limited. It is advisable to consult with healthcare professionals before use.

Breast-feeding

Microcrystalline cellulose is considered safe during breastfeeding, as it is not absorbed systemically.

Storage

Store in a cool, dry place away from direct sunlight and moisture.

AI-synthesized from BNF references - general information only, not a substitute for professional medical advice or the current BNF. Verify doses with a pharmacist.

Clinical monograph: starch

Starch is a polysaccharide carbohydrate consisting of a large number of glucose units joined by glycosidic bonds. It is a major energy source in the human diet and is found in numerous food sources such as grains, legumes, and tubers. In a clinical setting, starch can also be used as an excipient in various pharmaceuticals and is sometimes utilized in enteral nutrition formulations.

Indications

  • Nutritional supplementation
  • Energy source in enteral nutrition
  • Excipient in pharmaceutical formulations

Dosage

Children: Refer to specific guidelines or product inserts for dosing information, as it can vary based on the context of use.

Adults: Refer to specific guidelines or product inserts for dosing information, as it can vary based on the context of use.

Mechanism of action

Starch is broken down into glucose units by enzymes such as amylase during digestion. The glucose is then absorbed in the intestines and utilized for energy production in the body's cells. This pathway involves hydrolysis of the glycosidic bonds, converting starch into simpler sugars.

Pharmacodynamics

Starch primarily serves as an energy source. Its digestion and absorption lead to an increase in blood glucose levels, which provides energy for metabolic processes. In this context, it plays a crucial role in maintaining energy homeostasis in the body.

Pharmacokinetics

Starch is not absorbed in its polymeric form; it must first be enzymatically hydrolyzed into simpler sugars such as maltose and glucose. The digestion and absorption of starch occur predominantly in the small intestine, with glucose being readily absorbed into the bloodstream. The rate of absorption can vary depending on the type of starch and its physical form.

Adverse effects

  • Allergic reactions
  • Gastrointestinal discomfort
  • Diarrhea
  • Constipation

Precautions

  • Use with caution in individuals with known allergies to starch or starch derivatives
  • Monitor for gastrointestinal symptoms in patients with a history of digestive disorders

Pregnancy

Starch is generally considered safe for use during pregnancy. However, it should be consumed in moderation as part of a balanced diet.

Breast-feeding

Starch is deemed safe for nursing mothers when used in moderation as part of a balanced diet.

Storage

Store in a cool, dry place away from moisture and direct sunlight.

Formulations

  • Powder
  • Granules
  • Tablets
  • Suspensions

AI-synthesized from BNF references - general information only, not a substitute for professional medical advice or the current BNF. Verify doses with a pharmacist.

Molecular reference: Amlodipine

PubChem CID 2162

Molecular formula: C20H25ClN2O5

Mechanism of action

**Mechanism of action on blood pressure** Amlodipine is considered a peripheral arterial vasodilator that exerts its action directly on vascular smooth muscle to lead to a reduction in peripheral vascular resistance, causing a decrease in blood pressure. Amlodipine is a dihydropyridine calcium antagonist (calcium ion antagonist or slow-channel blocker) that inhibits the influx of calcium ions into both vascular smooth muscle and cardiac muscle. Experimental studies imply that amlodipine binds to both _dihydropyridine_ and _nondihydropyridine_ binding sites, located on cell membranes. The contraction of cardiac muscle and vascular smooth muscle are dependent on the movement of extracellular calcium ions into these cells by specific ion channels. Amlodipine blocks calcium ion influx across cell membranes with selectivity. A stronger effect of amlodipine is exerted on vascular smooth muscle cells than on cardiac muscle cells. Direct actions of amlodipine on vascular smooth muscle result in reduced blood pressure. **Mechanism of action in angina** The exact mechanism by which amlodipine relieves the symptoms of angina have not been fully elucidated to this date, however, the mechanism of action is likely twofold: Amlodipine has a dilating effect on peripheral arterioles, reducing the total peripheral resistance (afterload) against which the cardiac muscle functions. Since the heart rate remains stable during amlodipine administration, the reduced work of the heart reduces both myocardial energy use and oxygen requirements. Dilatation of the main coronary arteries and coronary arterioles, both in healthy and ischemic areas, is another possible mechanism of amlodipine reduction of blood pressure. The dilatation causes an increase in myocardial oxygen delivery in patients experiencing coronary artery spasm (Prinzmetal's or variant angina) and reduces coronary vasoconstriction caused by smoking. Amlodipine is a dihydropyridine calcium antagonist (calcium ion antagonist or slow-channel blocker) that inhibits the transmembrane influx of calcium ions into vascular smooth muscle and cardiac muscle. Experimental data suggest that amlodipine binds to both dihydropyridine and nondihydropyridine binding sites. The contractile processes of cardiac muscle and vascular smooth muscle are dependent upon the movement of extracellular calcium ions into these cells through specific ion channels. Amlodipine inhibits calcium ion influx across cell membranes selectively, with a greater effect on vascular smooth muscle cells than on cardiac muscle cells. Negative inotropic effects can be detected in vitro but such effects have not been seen in intact animals at therapeutic doses. Serum calcium concentration is not affected by amlodipine. Within the physiologic pH range, amlodipine is an ionized compound (pKa=8.6), and its kinetic interaction with the calcium channel receptor is characterized by a gradual rate of association and dissociation with the receptor binding site, resulting in a gradual onset of effect. Recent studies have suggested that cytokines are capable of modifying cardiovascular function and that drugs used in the treatment of heart failure have various modulating properties on the production of cytokines. More recently, we have found that ouabain induces the production of cytokines. This study was performed to examine the effects of calcium channel blockers on the production of cytokines induced by a cardiac glycoside. Human peripheral blood mononuclear cells (PBMC) were obtained from healthy volunteers. PBMC were cultured in 0.1, 1, 10, and 30 umol/L amlodipine, diltiazem, and nifedipine in presence of 1 umol/L ouabain. After 24 hr of incubation, IL-1alpha, IL-1beta, IL-6, and TNF-alpha were measured in the culture supernatants by enzyme-linked immunosorbent assay. Ouabain induced the production of IL-1alpha, IL-1beta and IL-6, but not of TNF-alpha. Induction of IL-1beta was most prominent. The production of IL-1alpha, and IL-6 wa

Pharmacodynamics

**General pharmacodynamic effects** Amlodipine has a strong affinity for cell membranes, modulating calcium influx by inhibiting selected membrane calcium channels. This drug's unique binding properties allow for its long-acting action and less frequent dosing regimen,. **Hemodynamic effects** After the administration of therapeutic doses of amlodipine to patients diagnosed with hypertension, amlodipine causes vasodilation, which results in a reduction of supine and standing blood pressure. During these blood pressure reductions, there are no clinically significant changes in heart rate or plasma catecholamine levels with long-term use. Acute intravenous administration of amlodipine reduces arterial blood pressure and increases heart rate in patients with chronic stable angina, however, chronic oral administration of amlodipine in clinical studies did not cause clinically significant alterations in heart rate or blood pressures in patients diagnosed with angina and normal blood pressure. With long-term, once daily oral administration, antihypertensive effectiveness is maintained for at least 24 hours. **Electrophysiologic effects** Amlodipine does not change sinoatrial (SA) nodal function or atrioventricular (AV) conduction in animals or humans. In patients who were diagnosed with chronic stable angina, the intravenous administration of 10 mg of amlodipine did not cause clinically significant alterations A-H and H-V conduction and sinus node recovery time after cardiac pacing. Patients administered amlodipine with concomitant beta-blockers produced similar results. In clinical trials in which amlodipine was given in combination with beta-blockers to patients diagnosed with hypertension or angina, no adverse effects on electrocardiographic parameters were noted. In clinical studies comprised of angina patients alone, amlodipine did not change electrocardiographic intervals or produce high degrees of AV block. **Effects on angina** Amlodipine relieves the symptoms of chest pain associated with angina. In patients diagnosed with angina, daily administration of a single amlodipine dose increases total exercise time, the time to angina onset, and the time to 1 mm ST-segment depression on ECG studies, decreases anginal attack frequency, and decreases the requirement for nitroglycerin tablets.

Source: PubChem (NCBI) · pathways from PathBank, Reactome, WikiPathways & PharmGKB.

Molecular reference: glycolate

PubChem CID 757

Molecular formula: C2H4O3

Mechanism of action

Ethylene glycol toxicity results from its metabolism to glycolic acid and other toxic metabolites. The accumulation of glycolate and the elimination kinetics of ethylene glycol and its metabolites are not well understood, so studies with male Sprague-Dawley rats and mixed breed dogs have been carried out. Ethylene glycol was administered by gavage to rats and dogs which were placed in metabolic cages for urine and blood sample collection at timed intervals. The peak plasma level of ethylene glycol occurred at 2 hr after dosing and that of glycolate between 4-6 hr. The rate of ethylene glycol elimination was somewhat faster in rats with a half-life of 1.7 hr compared to 3.4 hr in dogs. The maximum plasma level of glycolate was greater in rats although the pattern of accumulation was similar to that in dogs. Glycolate disappeared from the plasma at the same time as ethylene glycol, suggesting a slower rate of elimination of the metabolite than that of ethylene glycol. Renal excretion of ethylene glycol was an important route for its elimination accounting for 20-30% of the dose. Renal excretion of glycolate represented about 5% of the dose. Ethylene glycol induced an immediate, but short lived diuresis compared to that in control rats. Minimal clinical effects (mild acidosis with no sedation) were noted at these doses of ethylene glycol (1-2 g/kg) in both rats and dogs. The results indicate that the toxicokinetics of ethylene glycol and glycolate were similar in both species. The effect of 0.35 to 0.8 mmol/kg glycolic acid and 1.0 to 4.4 mmol/kg sodium glycolate on cyclopropane-epinephrine induced cardiac arrhythmias was examined using dogs. Doses of 0.35 to 0.5 mmol/kg glycolic acid increased the duration of arrhythmias in the 13 dogs tested, whereas doses >0.5 mmol/kg decreased or totally eliminated the arrhythmias in each of 11 dogs. Depression was observed for many of the dogs at higher doses. Sodium glycolate was much less effective in decreasing the arrhythmias, with 3 mmol/kg being required and its action being transient.

Source: PubChem (NCBI) · pathways from PathBank, Reactome, WikiPathways & PharmGKB.

Molecular reference: hydrogen

PubChem CID 783

Molecular formula: H2

Mechanism of action

Substantial evidence indicates that molecular hydrogen (H2) has beneficial vascular effects because of its antioxidant and/or anti-inflammatory effects. Thus, hydrogen-rich water may prove to be an effective anti-aging drink. This study examined the effects of H2 on endothelial senescence and clarified the mechanisms involved. Hydrogen-rich medium was produced by a high-purity hydrogen gas generator. Human umbilical vein endothelial cells (HUVECs) were incubated with 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) for various time periods in normal or hydrogen-rich medium. The baseline H2concentration in hydrogen-rich medium was 0.55 +/- 0.07 mmol/L. This concentration gradually decreased, and H2 was almost undetectable in medium after 12 hr. At 24 hr after TCDD exposure, HUVECs treated with TCDD exhibited increased 8OHdG and acetyl-p53 expression, decreased nicotinamide adenine dinucleotide (NAD(+))/NADH ratio, impaired Sirt1 activity, and enhanced senescence-associated beta-galactosidase. However, HUVECs incubated in hydrogen-rich medium did not exhibit these TCDD-induced changes accompanying Nrf2 activation, which was observed even after H2 was undetectable in the medium. Chrysin, an inhibitor of Nrf2, abolished the protective effects of H2 on HUVECs. H2 has long-lasting antioxidant and anti-aging effects on vascular endothelial cells through the Nrf2 pathway, even after transient exposure to H2. Hydrogen-rich water may thus be a functional drink that increases longevity. /Hydrogen-rich water/ Amyloid beta (Abeta) peptides are identified /as a/ cause of neurodegenerative diseases such as Alzheimer's disease (AD). Previous evidence suggests Abeta-induced neurotoxicity is linked to the stimulation of reactive oxygen species (ROS) production. The accumulation of Abeta-induced ROS leads to increased mitochondrial dysfunction and triggers apoptotic cell death. This suggests antioxidant therapies may be beneficial for preventing ROS-related diseases such as AD. Recently, hydrogen-rich water (HRW) has been proven effective in treating oxidative stress-induced disorders because of its ROS-scavenging abilities. However, the precise molecular mechanisms whereby HRW prevents neuronal death are still unclear. In the present study, we evaluated the putative pathways by which HRW protects against Abeta-induced cytotoxicity /in SK-N-MC cells/. Our results indicated that HRW directly counteracts oxidative damage by neutralizing excessive ROS, leading to the alleviation of Abeta-induced cell death. In addition, HRW also stimulated AMP-activated protein kinase (AMPK) in a sirtuin 1 (Sirt1)-dependent pathway, which upregulates forkhead box protein O3a (FoxO3a) downstream antioxidant response and diminishes Abeta-induced mitochondrial potential loss and oxidative stress. Taken together, our findings suggest that HRW may have potential therapeutic value to inhibit Abeta-induced neurotoxicity. /Hydrogen-rich water/ The NLRP3 inflammasome, an intracellular multi-protein complex controlling the maturation of cytokine interleukin-1beta, plays an important role in lipopolysaccharide (LPS)-induced inflammatory cascades. Recently, the production of mitochondrial reactive oxygen species (mtROS) in macrophages stimulated with LPS has been suggested to act as a trigger during the process of NLRP3 inflammasome activation that can be blocked by some mitochondria-targeted antioxidants. Known as a ROS scavenger, molecular hydrogen (H2) has been shown to possess therapeutic benefit on LPS-induced inflammatory damage in many animal experiments. Due to the unique molecular structure, H2 can easily target the mitochondria, suggesting that H2 is a potential antagonist of mtROS-dependent NLRP3 inflammasome activation. Here we have showed that, in mouse macrophages, H2 exhibited substantial inhibitory activity against LPS-initiated NLRP3 inflammasome activation by scavenging mtROS. Moreover, the elimination of mtROS by H2 resultantly inhibited mtROS-mediated NLRP3 deubi

Source: PubChem (NCBI) · pathways from PathBank, Reactome, WikiPathways & PharmGKB.

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The same active ingredient registered across other registries we cover - including different brands.