Liniment Alba

Indications

• Hepatic encephalopathy
• Urea cycle disorders
• Acid-base disturbances

Dosage

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

Adults: Refer to the BNF for specific dosing information based on condition and clinical guidelines.

Mechanism of action

Ammonia is crucial for renal excretion and metabolism, which aids in the regulation of acid-base balance by generating bicarbonate ions and promoting renal net acid excretion. Acute exposure to ammonia can activate NMDA receptor signaling pathways, while high concentrations resulting from urea cycle enzyme deficiencies can cause alterations in astrocyte morphology and increased neuroactive metabolites. This includes oxidative/nitrosative stress that impacts neuronal and astrocytic function, contributing to cerebral ammonia toxicity and related neuropsychiatric effects.

Pharmacodynamics

As a gas, ammonia acts as a natural respiratory stimulant. Its renal metabolism contributes to whole body acid-base balance, while its toxic effects at elevated levels can lead to significant neurophysiological changes, particularly in the context of liver dysfunction. Ammonia's role in stimulating oxidative stress responses in brain cells can lead to cellular damage and altered signaling pathways.

Pharmacokinetics

Ammonia is primarily metabolized in the liver, where it is converted to urea through the urea cycle, facilitating its excretion. The balance of ammonia production and clearance is critical for maintaining normal physiological functions. Following inhalation, ammonia is rapidly absorbed and can cause irritation in the respiratory tract. Renal function significantly influences ammonia levels in the body, with changes in kidney function affecting its excretion and thus systemic concentrations.

Pregnancy

Ammonia is generally considered unsafe during pregnancy due to potential risks to fetal development.

Breast-feeding

Ammonia may be present in breast milk; caution is advised.

Storage

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

Indications

• Nitrogen supplementation in clinical nutrition
• Management of metabolic alkalosis
• Treatment of certain types of kidney disorders

Dosage

Children: Specific pediatric dosing information is not detailed in the BNF. Refer to the BNF for Children for appropriate dosing based on age and condition.

Adults: Dosage varies based on clinical indication and should be guided by specific treatment protocols. Refer to clinical guidelines for detailed dosing information.

Mechanism of action

Ammonium ions participate in various metabolic pathways, including the biosynthesis of amino acids and nucleotides. It serves as a nitrogen source for organisms, facilitating the synthesis of essential biomolecules. The presence of ammonium can influence pH levels and osmotic balance within cells, thereby affecting cellular functions and enzyme activities.

Pharmacodynamics

Ammonium affects cellular metabolism by acting as a nitrogen donor in the synthesis of organic compounds. Its role in the nitrogen cycle and as a substrate in biochemical pathways allows for the maintenance of cellular functions, including energy production and cellular growth. Alterations in ammonium levels can influence various physiological processes, including neurotransmitter synthesis and energy metabolism.

Pharmacokinetics

Ammonium is readily absorbed and distributed in biological systems. It can be produced endogenously through amino acid metabolism or obtained from dietary sources. The excretion of ammonium primarily occurs through the kidneys, where it is converted to urea for elimination. Ammonium levels are regulated by various mechanisms, including the action of renal tubular cells that either secrete or reabsorb ammonium based on the body's needs.

Indications

• Cough associated with respiratory tract infections
• Acid-base disorders
• Edema management

Dosage

Children: Refer to the BNF for Children for appropriate paediatric dosing guidelines based on age and condition.

Adults: Refer to the BNF for specific adult dosing guidelines as they depend on the indication and clinical context.

Mechanism of action

Ammonium chloride increases acidity by raising hydrogen ion concentrations. It dissociates into ammonium and chloride ions; the ammonium is converted to urea in the liver, releasing hydrogen ions that lower pH. The chloride ions displace bicarbonate in extracellular fluid, leading to acidosis and increased renal excretion of electrolytes and water, resulting in fluid mobilization.

Pharmacodynamics

Ammonium chloride acts as a systemic acidifier, facilitating the excretion of chloride and sodium, while also increasing the acidity of body fluids. The conversion of ammonium to urea in the liver with the release of hydrogen ions contributes to a decrease in blood pH, affecting acid-base balance in the body.

Pharmacokinetics

Ammonium chloride is absorbed from the gastrointestinal tract and metabolized in the liver, where it is converted to urea. The dissociated ions impact renal function, leading to increased excretion of sodium, potassium, and water. The elimination half-life and specific metabolism details are not explicitly defined.

Adverse effects

• Nausea
• Vomiting
• Abdominal pain
• Diarrhea
• Dizziness
• Headache

Interactions

• Antacids may reduce the effectiveness of ammonium chloride
• Potassium-sparing diuretics may increase the risk of hyperkalemia

Precautions

• Use with caution in patients with renal impairment
• Monitor electrolyte levels during prolonged therapy
• Consider potential for acidosis in patients with liver disease

Pregnancy

Ammonium chloride should only be used during pregnancy if the potential benefit justifies the potential risk to the fetus. Consult a healthcare provider for individualized advice.

Breast-feeding

Ammonium chloride is excreted in breast milk. Use caution and consult a healthcare provider if breastfeeding.

Storage

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

Formulations

• Oral solution
• Powder for oral solution

Indications

• Dietary supplement for cardiovascular health
• Nutritional support in metabolic disorders
• Excipients in pharmaceutical formulations
• Potential adjunct in the management of inflammatory conditions

Dosage

Children: Refer to specific product guidelines or clinical protocols for dosing recommendations, as oleic acid is typically used in dietary or supplemental forms, and exact dosages can vary based on formulation.

Adults: Refer to specific product guidelines or clinical protocols for dosing recommendations, as oleic acid is typically used in dietary or supplemental forms, and exact dosages can vary based on formulation.

Mechanism of action

Oleic acid exerts its effects primarily through its role in cell membrane composition and function. It influences the fluidity and permeability of membranes, which can affect various cellular signaling pathways. Additionally, oleic acid has been shown to modulate gene expression related to lipid metabolism and inflammation, and it may activate specific nuclear receptors such as peroxisome proliferator-activated receptors (PPARs).

Pharmacodynamics

Oleic acid is recognized for its beneficial effects on lipid profiles, including lowering low-density lipoprotein (LDL) cholesterol levels while increasing high-density lipoprotein (HDL) cholesterol levels. It possesses anti-inflammatory properties, potentially reducing the risk of chronic diseases associated with inflammation, such as cardiovascular diseases. The anti-inflammatory effects are thought to be mediated by the modulation of cytokine production and the inhibition of pro-inflammatory pathways.

Pharmacokinetics

Oleic acid is absorbed in the gastrointestinal tract and is transported in the bloodstream primarily as part of triglycerides and phospholipids. Its metabolism occurs in the liver and other tissues, where it can be oxidized for energy or incorporated into various lipid molecules. The distribution of oleic acid is widespread, as it is a component of cell membranes throughout the body. Oleic acid has a relatively long half-life, and its effects can persist beyond its direct presence in circulation.

Pregnancy

Oleic acid is generally recognized as safe when used in food and cosmetics. However, its effects during pregnancy have not been extensively studied, and caution is advised.

Breast-feeding

Oleic acid is present in breast milk and is considered safe during breastfeeding. However, consult a healthcare provider for personalized advice.

Storage

Store in a cool, dry place away from direct sunlight. Ensure containers are tightly sealed to prevent oxidation.

Formulations

• Oleic acid liquid
• Oleic acid ointments
• Oleic acid creams

Dosage

Children: Refer to specific drug formulations and product labels as purified substances can vary widely in their use and dosing.

Adults: Refer to specific drug formulations and product labels as purified substances can vary widely in their use and dosing.

Mechanism of action

The mechanism of action for purified compounds varies widely depending on the specific substance. Generally, purified drugs exert their effects by interacting with specific biological targets, such as receptors, enzymes, or ion channels, leading to a desired therapeutic effect. This interaction can involve binding to receptors to activate or inhibit signaling pathways, modulating enzymatic activity, or altering physiological processes.

Pharmacodynamics

Pharmacodynamics describes the effects of a drug on the body and the relationship between drug concentration and effect. For purified drugs, this can involve dose-response relationships and the time course of their action. The purified form often enhances potency and reduces variability in response among patients, which can lead to more predictable therapeutic outcomes. The overall effect is determined by the drug's affinity for its target, the efficacy of the drug-receptor interaction, and the downstream signaling pathways activated as a result of this interaction.

Pharmacokinetics

Pharmacokinetics involves the absorption, distribution, metabolism, and excretion (ADME) of a drug. For purified substances, absorption can be more efficient due to the absence of impurities that may affect solubility or stability. Distribution may also be enhanced, leading to higher bioavailability. Metabolism can be influenced by the structure of the purified compound, as it may be metabolized more readily by liver enzymes. Excretion typically occurs through the kidneys or liver, depending on the molecular characteristics of the purified drug.

Pregnancy

Consult with a healthcare professional, as the safety of purified forms of medications during pregnancy may vary depending on the specific substance.

Breast-feeding

Consult with a healthcare professional, as the safety of purified forms of medications during breastfeeding may vary depending on the specific substance.

Storage

Store in a cool, dry place, away from light and moisture, and keep out of reach of children.

Indications

• Severe pain management
• Acute inflammatory conditions
• Chronic pain syndromes
• Postoperative pain relief
• Cancer-related pain
• Severe anxiety or depression (specific agents)

Dosage

Children: Refer to BNF for Children for specific paediatric dosing recommendations based on age, weight

Adults: Refer to specific guidelines or BNF for exact dosing information based on the drug type and condition being treated.

Mechanism of action

The mechanism of action for strong medications can vary significantly. For example, opioids work by binding to specific receptors in the central nervous system (CNS), primarily mu-opioid receptors, which leads to inhibition of pain signaling and modulation of emotional responses to pain. NSAIDs typically exert their effects by inhibiting cyclooxygenase enzymes (COX-1 and COX-2), leading to decreased production of prostaglandins, which are mediators of inflammation and pain. Other strong medications may act through different pathways, such as altering neurotransmitter levels or modulating immune responses.

Pharmacodynamics

Pharmacodynamics of strong medications includes their effects on the body, particularly in terms of analgesia, anti-inflammatory effects, or modulation of various physiological systems. The efficacy of these medications is often assessed through their impact on pain relief, reduction of inflammation, or improvement in mood or anxiety levels. Tolerance and dependence may develop with long-term use of certain strong medications, particularly opioids, necessitating careful management.

Pharmacokinetics

Pharmacokinetics of strong medications encompasses absorption, distribution, metabolism, and excretion (ADME). For example, opioids are typically well-absorbed orally and undergo significant first-pass metabolism in the liver, which can affect bioavailability. The volume of distribution varies, influencing how the drug is distributed throughout the body, while the elimination half-life can differ widely among strong medications, impacting dosing frequency and duration of action.

Pregnancy

Consult a healthcare provider for risk assessment, as safety data may be limited.

Breast-feeding

Consult a healthcare provider, as the effects on nursing infants are not well studied.

Storage

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

Indications

• Local antiseptic
• Irritant for mucous membranes
• Traditional medicinal uses

Dosage

Children: Refer to established guidelines and clinical practice for specific dosages, as turpentine is not commonly used in modern medicine.

Adults: Refer to established guidelines and clinical practice for specific dosages, as turpentine is not commonly used in modern medicine.

Mechanism of action

Turpentine acts as a local irritant, leading to increased blood flow and inflammatory response in tissues. It may also exert some antimicrobial effects, although the exact pathways are not well defined. The main active components are terpenes, which can affect cellular membranes and interfere with microbial function.

Pharmacodynamics

Turpentine exhibits irritant properties, resulting in stimulation of sensory nerves and local inflammatory responses. It may also have some systemic effects when absorbed, which can lead to toxicity if ingested or inhaled in large amounts. The pharmacological effects are primarily due to its terpene content, which can impact various biological pathways.

Pharmacokinetics

Turpentine is rapidly absorbed through mucous membranes and skin. It is metabolized in the liver, where it undergoes oxidation and conjugation. The metabolites are primarily excreted via the urine. Due to its volatile nature, turpentine can also be inhaled, leading to rapid absorption into the bloodstream. The half-life of turpentine varies based on the method of exposure and individual metabolism.

Contra-indications

• Hypersensitivity to turpentine or any component of the formulation
• Pregnancy and lactation due to potential harmful effects

Adverse effects

• Skin irritation or dermatitis upon topical application
• Gastrointestinal disturbances such as nausea, vomiting, and diarrhea
• Respiratory irritation from inhalation
• Central nervous system effects including headache, dizziness, and confusion
• Kidney damage with prolonged exposure or high doses

Interactions

• May interact with other CNS depressants, increasing sedation
• Potentially enhances the effects of certain medications metabolized by the liver

Precautions

• Use with caution in individuals with pre-existing respiratory conditions
• Should not be ingested or applied to broken skin
• Avoid inhalation of vapors

Pregnancy

Not recommended. Potentially harmful effects on the fetus have been reported.

Breast-feeding

Not recommended. Potential for excretion in breast milk and harmful effects on the infant.

Storage

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

Formulations

• Topical ointments or liniments
• Inhalation solutions
• Oral preparations (not commonly recommended due to toxicity)

Mechanism of action

Renal excretion and metabolism of ammonia is critical in regulation of acid-base balance by generating bicarbonate ions and promoting renal net acid excretion, both under basal conditions and in response to acid-base disturbances. There is evidence that acute ammonia exposure activates NMDA receptor signalling pathways, and high concentrations of ammonia resulting from urea cycle enzyme deficiencies are associated with changes in astrocyte morphology due to glutamine accumulation, changes in the expression of key astrocyte proteins, and increased concentrations of neuroactive L-tryptophan metabolites. ... Ammonia plays a key role in the pathogenesis of hepatic encephalopathy, which manifests as a neuropsychiatric syndrome accompanying acute and chronic liver failure. One consequence of ammonia action on the brain is astrocyte swelling, which triggers the generation of oxidative/nitrosative stress at the level of NADPH oxidase, nitric oxide synthases and the mitochondria. A self-amplifying signaling loop between oxidative stress and astrocyte swelling has been proposed. Consequences of the ammonia-induced oxidative/nitrosative stress response are protein modifications through nitration of tyrosine residues and oxidation of astrocytic and neuronal RNA. Nitrosative stress also mobilizes zinc from intracellular stores with impact on gene expression. These alterations may at least in part mediate cerebral ammonia toxicity through disturbances of intracellular and intercellular signaling and of synaptic plasticity. Oxidative/nitrosative stress and a low-grade cerebral edema as key events in the pathogenesis of ammonia toxicity and hepatic encephalopathy may offer potential new strategies for treatment. Ammonia-induced oxidation of RNA and proteins may impair postsynaptic protein synthesis, which is critically involved in learning and memory consolidation. RNA oxidation offers a novel explanation for multiple disturbances of neurotransmitter systems and gene expression and the cognitive deficits observed in hepatic encephalopathy. SRP: Ammonia in an aqueous environment exists in equilibrium between ionized ammonium cation and the non-ionized ammonia. This equilibrium can be affected by buffers, pH, temperature, and salinity. Thus in many cases it is not possible to assign the associated toxicity to the ionized or non-ionized form of the ammonia-nitrogen. /Aqueous ammonia/ Mechanisms involved in hepatic encephalopathy (HE) still remain poorly understood. It is generally accepted that ammonia plays a major role in this disorder, and that astrocytes represent the principal target of ammonia neurotoxicity. In recent years, studies from several laboratories have uncovered a number of factors and pathways that appear to be critically involved in the pathogenesis of this disorder. Foremost is oxidative and nitrosative stress (ONS), which is largely initiated by an ammonia-induced increase in intracellular Ca(2+). Such increase in Ca(2+) activates a number of enzymes that promote the synthesis of reactive oxygen-nitrogen species, including constitutive nitric oxide synthase, NADPH oxidase and phospholipase A2. ONS subsequently induces the mitochondrial permeability transition, and activates mitogen-activated protein kinases and the transcription factor, nuclear factor-kappaB (NF-kappaB). These factors act to generate additional reactive oxygen-nitrogen species, to phosphorylate various proteins and transcription factors, and to cause mitochondrial dysfunction. This article reviews the role of these factors in the mechanism of HE and ammonia toxicity with a focus on astrocyte swelling and glutamate uptake, which are important consequences of ammonia neurotoxicity.... A new model for ammonia excretion in freshwater fish and its variable linkage to Na(+) uptake and acid excretion /is proposed/. In this model, /the Rhesus protein/ Rhag facilitates NH(3) flux out of the erythrocyte, Rhbg moves it across the basolateral membrane of the branchial i

Pharmacodynamics

As a gas, ammonia is a natural byproduct and respiratory stimulant. Its renal metabolism plays a role in whole body acid-base balance.

Mechanism of action

Ammonium chloride increases acidity by increasing the amount of hydrogen ion concentrations. Ammonium chloride can be used as an expectorant due to its irritative action on the bronchial mucosa. This effect causes the production of respiratory tract fluid which in order facilitates the effective cough. The acid-forming properties of ammonium chloride result from dissociation of the salt to an ammonium cation and a chloride anion. In patients with normal hepatic function, the ammonium cation is converted to urea by the liver and a hydrogen cation is released which reacts with a bicarbonate ion to form water and carbon dioxide. The chloride anion combines with fixed bases in the extracellular fluid, thereby reducing the alkaline reserve of the body. The net result is the displacement of bicarbonate ions by chloride anions. The displacement of bicarbonate by chloride alters the bicarbonate:carbonic acid ratio if the body and acidosis results. The increased chloride concentration in the extracellular fluid produces an increased load to the renal tubules and appreciable amounts of chloride anions escape reabsorption. These anions are excreted along with cations and water. Sodium is the principal cation excreted; however, potassium excretion may also be increased to some degree. By increasing the excretion of both extracellular electrolytes and water, ammonium chloride causes a net loss of extracellular fluid and promotes the mobilization of edema fluid.

Pharmacodynamics

Systemic acidifier. In liver ammonium chloride is converted into urea with the liberation of hydrogen ions ( which lowers the pH) and chloride.