CATOXYMAG N SUSPENSION

Indications

• Gastroesophageal reflux disease (GERD)
• Dyspepsia
• Heartburn
• Bloating and discomfort associated with gas

Dosage

Children: Refer to the BNF for Children for specific dosing information, as paediatric doses must be tailored based on age and weight.

Adults: Refer to specific product guidelines, as dosages can vary based on formulation and manufacturer recommendations.

Mechanism of action

Alginatesimethicone acts through two primary mechanisms. Alginates work by reacting with gastric acid to form a viscous gel that floats on the surface of the stomach contents, creating a barrier that minimizes reflux of acid into the esophagus. Simethicone, a silicone-based compound, reduces surface tension of gas bubbles, facilitating their coalescence and elimination, thus relieving bloating and discomfort associated with gas.

Pharmacodynamics

The pharmacodynamic properties of alginatesimethicone involve its ability to physically change the properties of gastric contents. The alginate gel provides a physical barrier against acid reflux, protecting the esophageal mucosa from acidic injury. Simethicone acts as an anti-foaming agent, reducing the tension of gas bubbles and enhancing their elimination from the gastrointestinal tract, which helps alleviate bloating and discomfort.

Pharmacokinetics

Alginates are not significantly absorbed systemically, as they primarily act locally in the gastrointestinal tract. The onset of action is typically rapid, with effects seen shortly after administration. Simethicone also remains unabsorbed and works locally to reduce gas-related symptoms. The overall duration of effect can vary depending on the formulation and individual patient factors.

Adverse effects

• Constipation
• Diarrhea
• Abdominal discomfort
• Flatulence

Precautions

• Use with caution in patients with known hypersensitivity to any of the components.
• Patients with pre-existing gastrointestinal conditions should be monitored closely.

Pregnancy

Generally considered safe for use during pregnancy, but should be used under the guidance of a healthcare provider.

Breast-feeding

Considered safe for use while breastfeeding, but consultation with a healthcare provider is recommended.

Storage

Store in a cool, dry place, away from direct sunlight. Keep out of reach of children.

Formulations

• Oral suspension
• Chewable tablets

Indications

• Dyspepsia
• Peptic ulcer disease
• Gastroesophageal reflux disease (GERD)
• Heartburn
• Diarrhea
• Mucosal irritations

Dosage

Children: Refer to the BNF for Children for appropriate dosing guidelines.

Adults: Refer to the BNF for specific dosing recommendations based on the condition being treated.

Mechanism of action

Aluminum acts as an astringent, causing local shrinkage or constriction of body tissues through osmotic flow of fluids away from the area of application. This mechanism assists in reducing mucous secretions and managing conditions such as peptic ulcers and diarrhea. Additionally, it can help in drying and hardening of tissues when applied topically.

Pharmacodynamics

Aluminum-based antacids work by neutralizing gastric acid, leading to an increase in gastric pH. This action helps to alleviate symptoms associated with excess gastric acid, such as heartburn and discomfort. The astringent properties of aluminum also contribute to its therapeutic effects in managing mucosal irritations and secretions.

Pharmacokinetics

Aluminum is absorbed minimally when taken orally, with a bioavailability of about 0.1 to 0.5%. The majority of aluminum is excreted renally, and its half-life can be prolonged in individuals with renal impairment. Long-term use may lead to accumulation and potential toxicity, particularly impacting bone and neurological health.

Interactions

• aluminiumhydroxide+deferasirox: Severe (decreases exposure)
• aluminiumhydroxide+enteralfeeds: Unknown (increases risk of blocked enteral or nasogastric tubes)
• aluminiumhydroxide+roxadustat: Unknown (decreases exposure)

Pregnancy

Aluminum compounds are generally considered safe in pregnancy when used as directed. However, excessive exposure should be avoided.

Breast-feeding

Aluminum is excreted in breast milk; caution is advised when administered to nursing mothers.

Storage

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

Formulations

• aluminium hydroxide suspension
• aluminium hydroxide tablets

Indications

• Nutritional supplementation
• Herbal therapy for various conditions
• Preservation of medicinal properties of plants

Dosage

Children: Dosage for dried herbal preparations in children should be approached cautiously and is best determined by a healthcare professional. Refer to paediatric guidelines for specific dosing recommendations.

Adults: Dosage for dried herbal preparations varies widely depending on the specific herb and its intended use. Refer to specific guidelines or reputable sources for dosing information.

Mechanism of action

The mechanism of action for dried herbal preparations varies depending on the specific plant material involved. Generally, the active constituents in dried herbs can exert their effects through various pathways, such as modulating neurotransmitter systems, influencing metabolic pathways, and acting on specific receptors in the body. For instance, flavonoids, terpenes, and alkaloids found in certain dried herbs can exhibit anti-inflammatory, antioxidant, or antimicrobial properties.

Pharmacodynamics

The pharmacodynamics of dried drugs depend on their specific chemical constituents. These compounds can affect physiological functions, such as modulating inflammatory responses, enhancing immune function, or affecting neurotransmission. The effects can vary widely based on the type of herb, the method of drying, and the concentration of active ingredients.

Pharmacokinetics

The pharmacokinetics of dried herbal preparations can vary significantly based on the specific herb used. Generally, after ingestion, the active compounds are absorbed in the gastrointestinal tract, metabolized primarily by the liver, and then excreted through urine or feces. The bioavailability of these compounds can be influenced by factors such as the form of the preparation (e.g., powder, extract), the presence of other food substances, and individual patient characteristics.

Pregnancy

Safety during pregnancy has not been established. Consult a healthcare provider before use.

Breast-feeding

Consult a healthcare provider before use during breastfeeding.

Storage

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

Dosage

Children: Refer to specific guidelines for pediatric dosing; consult the BNF for Children for accurate dosage information.

Adults: Refer to specific guidelines for use; dosage may vary based on the context of use.

Mechanism of action

Hydroxide ions act primarily as bases, neutralizing acids to form water and salts. They participate in various biochemical pathways, including selenium metabolism and the degradation of reactive oxygen species. Hydroxide can influence enzyme activity and stability by altering the pH of the environment, thereby affecting metabolic reactions.

Pharmacodynamics

Hydroxide ions can impact biological processes by changing the local pH, which influences enzyme activity, ion transport, and the solubility of other compounds. Their ability to neutralize acids can help regulate physiological pH, contributing to homeostasis in living organisms.

Pharmacokinetics

As an inorganic ion, hydroxide does not undergo traditional pharmacokinetic processes like absorption, distribution, metabolism, or excretion. Instead, it is rapidly equilibrated in biological fluids and participates in acid-base reactions, having immediate effects on the local environment.

Pregnancy

There is limited information regarding the use of hydroxide during pregnancy. Consult a healthcare professional for advice.

Breast-feeding

Limited data is available on the excretion of hydroxide in breast milk. Consult a healthcare professional before use.

Storage

Store in a cool, dry place away from direct sunlight. Keep out of reach of children.

Indications

• Gastroesophageal reflux disease (GERD)
• Peptic ulcers
• Heartburn
• Indigestion
• Constipation

Dosage

Children: Refer to BNF for Children for specific dosing recommendations.

Adults: Refer to BNF for specific dosing recommendations.

Mechanism of action

Magnesium hydroxide functions as an antacid by dissociating in the stomach to form magnesium ions (Mg²+) and hydroxide ions (OH-). The hydroxide ions react with gastric acid (HCl) to form water and magnesium chloride, which neutralizes acidity. Additionally, magnesium hydroxide draws water into the intestinal lumen via osmosis, stimulating bowel movements and alleviating constipation.

Pharmacodynamics

The pharmacodynamic effects of magnesium hydroxide include the neutralization of gastric acid and an increase in intraluminal fluid volume in the intestines. These effects lead to symptomatic relief from acid-related conditions and promote laxation. The onset of action for antacid effects typically occurs within 30 minutes to 1 hour, while laxative effects may take 6 to 12 hours post-ingestion.

Pharmacokinetics

Magnesium hydroxide is minimally absorbed from the gastrointestinal tract, with most of the compound remaining in the gut. The magnesium ions that are absorbed are excreted primarily by the kidneys. Its bioavailability is low because it acts mainly locally within the gastrointestinal tract. The half-life of magnesium in the body depends on renal function, as impaired renal function can lead to accumulation and potential toxicity.

Contra-indications

• Hypersensitivity to magnesium hydroxide or any component of the formulation
• Severe renal impairment
• Abdominal pain of unknown origin
• Bowel obstruction

Adverse effects

• Diarrhea
• Abdominal cramping
• Nausea
• Electrolyte imbalances, particularly hypermagnesemia
• Dehydration

Interactions

• May interact with certain antibiotics (e.g., tetracyclines, quinolones) by reducing their absorption
• May affect the absorption of other medications due to its antacid properties
• Concurrent use with other magnesium-containing products may increase the risk of hypermagnesemia

Precautions

• Use with caution in patients with renal impairment
• Monitor renal function in patients receiving prolonged therapy
• Assess for signs of electrolyte imbalance, particularly in the elderly or those with underlying health issues

Pregnancy

Magnesium hydroxide is generally considered safe for use during pregnancy, but it should only be used if clearly needed.

Breast-feeding

Magnesium hydroxide is excreted in breast milk, but is not expected to cause adverse effects in nursing infants when used as directed.

Storage

Store at room temperature, away from moisture and heat. Keep out of reach of children.

Formulations

• Oral suspension
• Chewable tablets
• Powder for oral solution

Indications

• pH adjustment in chemical processes
• water treatment
• saponification in soap making
• industrial cleaning agent

Dosage

Children: Refer to specific industrial or laboratory guidelines for appropriate concentrations and safety measures, as sodium hydroxide is typically not used in therapeutic contexts.

Adults: Refer to specific industrial or laboratory guidelines for appropriate concentrations and safety measures, as sodium hydroxide is typically not used in therapeutic contexts.

Mechanism of action

Sodium hydroxide acts by dissociating in water to yield sodium ions (Na+) and hydroxide ions (OH-). The hydroxide ions increase the pH of the solution, making it more alkaline. This alkalinity can neutralize acids and can lead to saponification when reacting with fats and oils. The strong basicity of sodium hydroxide can also cause protein denaturation, leading to tissue damage in cases of exposure.

Pharmacodynamics

As a strong base, sodium hydroxide has a rapid and potent effect on biological tissues. Its alkaline nature can disrupt cellular processes, leading to cell lysis and inflammation upon contact. In therapeutic settings, it is primarily used to modify pH levels rather than for direct pharmacological effects.

Pharmacokinetics

Sodium hydroxide does not undergo significant metabolism in the body. Its effects are primarily local, occurring at the site of application. Systemic absorption is minimal due to its strong corrosive nature, which limits its use in clinical settings. The compound is rapidly neutralized by acids in the gastrointestinal tract when ingested, leading to the formation of sodium salts and water.

Contra-indications

• Hypersensitivity to sodium hydroxide
• Severe burns or skin injuries caused by caustic substances

Adverse effects

• Chemical burns upon contact with skin or mucous membranes
• Respiratory irritation if inhaled
• Gastrointestinal burns if ingested
• Corrosive damage to tissues

Precautions

• Use with caution in patients with a history of respiratory conditions
• Handle with care to avoid accidental exposure
• Avoid contact with strong acids as it can produce violent reactions

Pregnancy

There is limited information on the use of sodium hydroxide during pregnancy. It should only be used if the potential benefits justify the risks.

Breast-feeding

Caution is advised; there is insufficient data on the effects of sodium hydroxide during breastfeeding.

Storage

Store in a cool, dry place, away from incompatible materials. Keep tightly closed and out of reach of children.

Formulations

• Sodium hydroxide solution
• Sodium hydroxide pellets

Indications

• Peptic ulcers
• Gastroesophageal reflux disease (GERD)
• Dyspepsia
• Heartburn

Dosage

Children: Refer to BNF for Children for specific dosing information.

Adults: Refer to prescribing guidelines for specific doses.

Mechanism of action

Magnesium trisilicate works by chemically reacting with gastric hydrochloric acid (HCl) to form magnesium chloride, water, and silicate. This reaction increases the pH of the stomach contents, effectively neutralizing acidity and providing symptomatic relief from heartburn and indigestion. Additionally, the silicate component may contribute to the formation of a protective barrier on the gastric mucosa.

Pharmacodynamics

The pharmacodynamic properties of magnesium trisilicate include its ability to reduce gastric acidity and increase gastric pH. This action helps to alleviate symptoms associated with acid-related disorders. The onset of action is generally rapid, providing quick relief from discomfort. The duration of action may vary depending on the formulation and individual patient factors.

Pharmacokinetics

Magnesium trisilicate is not absorbed systemically; its action is localized within the gastrointestinal tract. Once ingested, the compound remains in the stomach and does not significantly enter the bloodstream. The elimination of magnesium is primarily through renal pathways, and caution should be exercised in patients with renal impairment to avoid potential toxicity.

Contra-indications

• Hypersensitivity to trisilicatemagnesium or any of its components
• Severe renal impairment
• Gastrointestinal obstruction

Adverse effects

• Constipation
• Diarrhea
• Abdominal discomfort
• Nausea
• Electrolyte imbalance

Interactions

• May reduce the absorption of certain drugs due to altered gastric pH
• Antacids may interact with tetracycline and other antibiotics, decreasing their effectiveness
• May affect the bioavailability of certain medications such as digoxin and warfarin

Precautions

• Use with caution in patients with renal impairment
• Monitor for signs of electrolyte imbalance, especially in long-term use
• Consider potential interactions with other medications

Pregnancy

Trisilicatemagnesium is generally considered safe for use during pregnancy but should be used under medical supervision.

Breast-feeding

Trisilicatemagnesium is excreted in breast milk in small amounts, therefore caution is advised.

Storage

Store in a cool, dry place, away from direct sunlight. Keep out of reach of children.

Formulations

• Oral suspension
• Chewable tablets
• Effervescent tablets

Mechanism of action

Aluminum Acetate is an astringent. An astrignent is a chemical that tends to shrink or constrict body tissues, usually locally after topical medicinal application. The shrinkage or constriction is through osmotic flow of water (or other fluids) away from the area where the astringent was applied. Astringent medicines cause shrinkage of mucous membranes or exposed tissues and are often used internally to check discharge of blood serum or mucous secretions. This can happen with a sore throat, hemorrhages, diarrhea, or with peptic ulcers. Externally applied astringents, which cause mild coagulation of skin proteins, dry, harden, and protect the skin. Acne sufferers are often advised to use astringents if they have oily skin. Astringents also help heal stretch marks and other scars. Mild astringent solutions are used in the relief of such minor skin irritations as those resulting from superficial cuts, allergies, insect bites, or fungal infections such as athlete's foot. Excessive dietary aluminum has been proposed to be a factor contributing to several neurological disorders in humans. Six 8-week-old female Swiss Webster mice were fed for 10 wk purified diets containing 100 (control), 500 or 1000 ug aluminum/g diet. Brain and liver lipid peroxidation was determined by evaluating the production of 2-thiobarbituric acid reactive substances in brain and liver homogenates in the presence or absence of 50 uM ferrous iron. 2-Thiobarbituric acid reactive substances production in the absence of iron in brain homogenates from mice fed the 1000 ug/g diet was higher (30%) than that in the 100 ug/g control group (3.1 vs 2.4 nmol 2-thiobarbituric acid reactive substances/mg protein). The addition of ferrous iron increased 2-thiobarbituric acid reactive substances production in brain homogenates from all 3 dietary groups. The iron induced 2-thiobarbituric acid reactive substances production was 26% higher in the 1000 ug/g brain homogenates than in the 100 ug/g group (4.9 vs 3.9 nmol 2-thiobarbituric acid reactive substances/mg protein). Brain 2-thiobarbituric acid reactive substances production in the presence and absence of iron was similar between the 100 and 500 ug/g aluminum groups. 2-Thiobarbituric acid reactive substances production in liver homogenates measured either with or without iron was similar for the 3 groups. These results show that, in mice, dietary aluminum intoxication leads to increased brain 2-thiobarbituric acid reactive substance production, suggesting that enhanced lipid peroxidation may be one possible mechanism underlying the neurological damage associated with increased tissue aluminum. Evidence is presented indicating that dementias are associated with a relative insufficiency of magnesium in the brain. Such insufficiency may be attributable to low intake or retention of magnesium; high intake of a neurotoxic metal, such as aluminum, which inhibits activity of magnesium requiring enzymes; or impaired transport of magnesium and/or enhanced transport of the neurotoxic metal into brain tissue. It is proposed that Alzheimer's disease involves a defective transport process, characterized by both an abnormally high incorporation of aluminum and an abnormally low incorporation that an altered serum protein contributes to the progression of Alzheimer's disease by having a greater affinity for aluminum than for magnesium, in contrast to the normal protein, which binds magnesium better than aluminum. The altered protein crosses the blood-brain barrier more efficiently than the normal protein and competes with the normal protein in binding to brain neurons. Binding of the altered protein to the target neurons would both facilitate aluminum uptake and impede magnesium uptake. Evidence suggests that albumin is the serum protein that is altered. Aluminum is established as a neurotoxin, although the basis for its toxicity is unknown. It recently has been shown to alter the function of the blood-brain barrier, which regulates ex