Nilfarm Gold

Indications

• Acidulant in food and beverages
• Preservative in pharmaceutical formulations
• pH adjuster in various chemical preparations

Dosage

Children: Refer to product-specific guidelines for appropriate dosing based on formulation and indication.

Adults: Refer to product-specific guidelines for appropriate dosing based on formulation and indication.

Mechanism of action

Citric acid acts by chelating metal ions, which can enhance the solubility of certain compounds and improve their bioavailability. It also contributes to the acidity of the environment, which can influence enzymatic activity and metabolic pathways, particularly in the degradation of citronellol.

Pharmacodynamics

Citric acid exhibits mild pharmacological effects primarily attributed to its role in metabolic processes. It aids in the regulation of pH levels, which can impact enzymatic reactions and biochemical pathways. The acid's chelating properties may help to reduce the toxicity of certain metal ions in biological systems.

Pharmacokinetics

Citric acid is rapidly absorbed after oral administration and is metabolized in the liver. It undergoes conversion to various metabolites in the citric acid cycle, contributing to energy production. The elimination primarily occurs through urine, with minimal accumulation in the body.

Pregnancy

Citric acid is generally regarded as safe during pregnancy when used in food amounts. However, consult a healthcare provider for advice on medicinal use.

Breast-feeding

Citric acid is considered safe during breastfeeding when consumed in food amounts. For medicinal use, consult a healthcare provider.

Storage

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

Indications

• Nematode infections
• Ascariasis
• Hookworm infections
• Strongyloidiasis
• Immunosuppression in certain cancer treatments

Dosage

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

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

Mechanism of action

The mechanism of action of levamisole as an antiparasitic agent involves agonistic activity towards the L-subtype nicotinic acetylcholine receptors in nematode muscles, reducing the males' ability to control reproductive muscles and limiting copulation. As an immunomodulator, levamisole enhances immune function by stimulating T-cell activation and proliferation, increasing antibody formation, and potentiating the functions of monocytes, macrophages, and neutrophils.

Pharmacodynamics

Levamisole acts as an anthelmintic by targeting nematode nicotinic acetylcholine receptors, leading to paralysis of the worms. As an immunomodulator, it behaves as an immunostimulant, increasing natural killer (NK) cells and activated T-cells, particularly when used adjuvantly with fluorouracil in cancer treatment. Its ability to enhance immune responses makes it valuable in clinical settings where immune function is compromised.

Pharmacokinetics

Levamisole is well absorbed following oral administration, with peak plasma concentrations typically occurring within 1 to 2 hours. It undergoes extensive hepatic metabolism, and its metabolites are primarily excreted via the kidneys. The half-life of levamisole varies, but it is generally around 5 to 7 hours in healthy individuals. Due to its immunomodulatory properties, the pharmacokinetics can be influenced by the patient's immune status and concomitant medications.

Adverse effects

• Nausea
• Vomiting
• Diarrhea
• Abdominal pain
• Rash
• Neutropenia
• Hepatotoxicity

Interactions

• Albendazole may have decreased exposure when used with levamisole
• Ivermectin may have increased exposure when used with levamisole

Precautions

• Use with caution in patients with a history of blood dyscrasias
• Monitor for signs of infection due to potential immunosuppressive effects
• Careful consideration should be given when prescribing to patients with liver impairment

Pregnancy

Levamisole should only be used during pregnancy if the potential benefit justifies the potential risk to the fetus, as safety in pregnancy has not been established.

Breast-feeding

Levamisole is excreted in human milk; therefore, a decision should be made whether to discontinue breastfeeding or to discontinue the drug, taking into account the importance of the drug to the mother.

Storage

Store at room temperature, away from light and moisture.

Formulations

• Tablets
• Oral solution

Indications

• Food preservation
• Antioxidant in pharmaceutical formulations
• Reducing agent in chemical processes
• Component in certain injectable medications

Dosage

Children: Refer to the specific product information or clinical guidelines for dosing recommendations, as dosages can vary based on formulation and intended use.

Adults: Refer to the specific product information or clinical guidelines for dosing recommendations, as dosages can vary based on formulation and intended use.

Mechanism of action

Metabisulphite acts as a reducing agent through its ability to donate electrons, leading to the reduction of other compounds. It reacts with free radicals and other reactive species, thus preventing oxidative damage to cells and tissues. The sulfite ion can also interact with thiol groups in proteins, altering their structure and function, which can have both beneficial and adverse effects depending on the context.

Pharmacodynamics

The pharmacodynamics of metabisulphite involve its antioxidant properties, which help protect cells from oxidative stress. By scavenging free radicals, it contributes to the stabilization of various compounds, prolonging their efficacy. However, its potential to induce oxidative stress and trigger allergic reactions in susceptible individuals is also recognized, necessitating caution in its use.

Pharmacokinetics

Metabisulphite is rapidly absorbed when administered, and its pharmacokinetic profile is influenced by the route of administration. It is metabolized to sulfite and further to sulfate in the liver. The elimination half-life is relatively short, with renal excretion being the primary route of elimination. Individuals with compromised renal function may have altered clearance rates, requiring careful monitoring.

Contra-indications

• Hypersensitivity to metabisulfite or any other sulfite compounds
• Asthma or a history of sulfite sensitivity

Adverse effects

• Allergic reactions, including anaphylaxis
• Respiratory distress in sensitive individuals
• Skin reactions such as rashes or urticaria

Interactions

• May interact with certain medications that can cause allergic reactions
• Possible enhancement of the effects of other sulfite-containing medications

Precautions

• Use with caution in patients with asthma or sulfite sensitivity
• Monitor for respiratory reactions in susceptible individuals

Pregnancy

Safety during pregnancy has not been established; use only if clearly needed.

Breast-feeding

Safety during breastfeeding is not well established; use with caution.

Storage

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

Formulations

• Powder for solution
• Tablet form
• Inhalation solution

Indications

• Allergic conditions
• Autoimmune diseases
• Asthma and chronic obstructive pulmonary disease (COPD)
• Certain cancers (e.g., leukemia, lymphoma)
• Skin conditions (e.g., dermatitis)
• Inflammatory bowel disease
• Multiple sclerosis exacerbations
• Severe infections requiring immunosuppression

Dosage

Children: Refer to BNF for Children for specific dosing; doses vary significantly based on the child's age, weight, and condition being treated.

Adults: Refer to BNF for specific dosing; typically, initial doses range from 4 to 48 mg depending on the severity of the condition.

Mechanism of action

Methylprednisolone exerts its effects by binding to glucocorticoid receptors, leading to the modulation of gene expression. This interaction influences the transcription of anti-inflammatory proteins while suppressing the expression of pro-inflammatory genes, ultimately resulting in reduced inflammation and immune response.

Pharmacodynamics

The pharmacodynamic effects of methylprednisolone are characterized by its ability to decrease inflammation, suppress the immune response, and affect carbohydrate metabolism. Therapeutic doses lead to various systemic effects, including modification of leukocyte distribution and inhibition of cytokine production.

Pharmacokinetics

Methylprednisolone is well absorbed after oral administration, with a bioavailability of approximately 50%. It has a volume of distribution that reflects extensive tissue binding. The drug is metabolized primarily in the liver through conjugation and reduction, and its metabolites are excreted in urine. The half-life varies based on the route of administration but is generally around 18 to 36 hours.

Adverse effects

• Increased blood pressure
• Hyperglycemia
• Weight gain
• Mood changes
• Insomnia
• Gastrointestinal disturbances
• Increased susceptibility to infections

Interactions

• methylphenidate+apraclonidine: Severe (decreases effects)
• methylthioninium chloride+bupropion: Severe (increases risk of severe hypertension)
• methylphenidate+linezolid: Severe (increases risk of elevated blood pressure)
• rasagiline+methylphenidate: Severe (increases risk of a hypertensive crisis)
• mao-inhibitors+methylphenidate: Severe (increases risk of a hypertensive crisis)
• dronedarone+methylprednisolone: Moderate (increases exposure)
• miconazole+methylprednisolone: Moderate (increases concentration)
• antifungals, azoles+methylprednisolone: Moderate (increases exposure)
• crizotinib+methylprednisolone: Moderate (increases exposure)

Precautions

• Use with caution in patients with hypertension
• Monitor blood glucose levels in diabetic patients
• Consider potential for infection risk due to immunosuppression
• Evaluate for psychiatric effects in susceptible individuals

Pregnancy

Corticosteroids may be used during pregnancy if the potential benefit justifies the risk to the fetus. Careful monitoring is advised.

Breast-feeding

Corticosteroids are excreted in breast milk; caution is advised. Monitor the infant for potential effects.

Storage

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

Formulations

• Tablets
• Injectable solutions
• Topical preparations

Mechanism of action

Methylsulphate functions as a methylating agent, transferring a methyl group to nucleophiles. This process involves the formation of a sulfonium ion, which is highly reactive and can readily react with nucleophilic sites on various substrates, leading to methylation reactions.

Pharmacodynamics

The pharmacodynamics of methylsulphate is primarily related to its role as a methylating agent in biochemical reactions. It can alter the structure and function of biological molecules, potentially affecting cellular processes and signaling pathways. However, detailed pharmacodynamic studies specific to therapeutic use are limited.

Pharmacokinetics

There is limited information on the pharmacokinetics of methylsulphate, given its typical use as a reagent in laboratory settings rather than a clinical drug. When used in chemical reactions, its reactivity and transformation into other compounds would dictate its pharmacokinetic profile, which could vary significantly based on the specific context of use.

Pregnancy

There is limited data on the use of methylsulphate in pregnancy. Consult relevant guidelines.

Breast-feeding

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

Storage

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

Indications

• Liver fluke infections (Fasciola hepatica, Fasciola gigantica)
• Other trematode infections

Dosage

Children: Refer to the BNF for Children for specific dosing guidelines in the paediatric population.

Adults: Refer to the BNF for specific dosing recommendations as they may vary depending on the indication and patient condition.

Mechanism of action

Oxyclozanide exerts its anthelmintic effects by disrupting the energy metabolism of the helminths. It interferes with the oxidative phosphorylation process in the mitochondria of the parasites, leading to a depletion of ATP and subsequent paralysis and death of the worms.

Pharmacodynamics

Oxyclozanide has a selective action against specific stages of the liver fluke, causing immobilization and eventual death of the parasite. Its activity is enhanced in the presence of bile acids, which facilitate its uptake by the parasites. The drug exhibits a broad spectrum of activity against trematodes.

Pharmacokinetics

Oxyclozanide is absorbed from the gastrointestinal tract and undergoes hepatic metabolism. It is eliminated primarily through the feces, with a minor fraction excreted in urine. The pharmacokinetic profile shows a relatively short half-life, necessitating multiple doses for continued efficacy against fluke infections.

Pregnancy

No evidence of risk in humans. However, safety during pregnancy has not been established.

Breast-feeding

It is unknown whether oxyclozanide is excreted in human breast milk. Caution is advised.

Storage

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

Indications

• Preservative in cosmetics
• Preservative in pharmaceuticals
• Preservative in food products

Dosage

Children: Refer to specific product guidelines as dosing varies based on formulation and concentration used.

Adults: Refer to specific product guidelines as dosing varies based on formulation and concentration used.

Mechanism of action

Parabens work by inhibiting the growth of microorganisms through their ability to disrupt the cellular processes of bacteria and fungi. They penetrate the microbial cell membrane and disrupt enzyme and protein functions, leading to cell death. Parabens are known to have low toxicity and are metabolized by the body, subsequently being excreted in urine.

Pharmacodynamics

Parabens demonstrate broad-spectrum antimicrobial activity, making them effective preservatives in various formulations. Their efficacy is influenced by factors such as concentration, pH, and the presence of other ingredients in the formulation. Due to their structural similarity to estrogen, there has been concern regarding their potential endocrine-disrupting effects, although the clinical significance of this is still debated.

Pharmacokinetics

Parabens are readily absorbed through the skin and gastrointestinal tract. Once absorbed, they are rapidly metabolized primarily in the liver. They undergo hydrolysis to form para-hydroxybenzoic acid, which is then conjugated with glucuronic acid and excreted in urine. The half-life of parabens in the human body is relatively short, and they are eliminated rapidly.

Adverse effects

• Allergic reactions, such as skin rashes
• Irritation at the site of application
• Endocrine disruption (in high concentrations)

Precautions

• Use with caution in individuals with known sensitivities or allergies to parabens
• Consider potential endocrine effects with prolonged exposure

Pregnancy

Parabens are generally considered safe in cosmetics and personal care products during pregnancy, although caution is advised due to potential endocrine disruption.

Breast-feeding

Parabens are considered safe in breastfeeding, but it is recommended to use products with minimal or no parabens when possible.

Storage

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

Formulations

• Topical creams
• Lotions
• Shampoos
• Conditioners
• Makeup products
• Pharmaceutical preparations

Indications

• Emulsifying agent in drug formulations
• Stabilizer for parenteral preparations
• Solubilizer for hydrophobic drug compounds
• Ingredient in topical formulations

Dosage

Children: Refer to specific product guidelines, as dosing varies based on formulation and intended use.

Adults: Refer to specific product guidelines, as dosing varies based on formulation and intended use.

Mechanism of action

Polysorbate functions primarily as an emulsifying agent. It reduces the surface tension between immiscible liquids, allowing them to mix more easily. This property is particularly useful in stabilizing emulsions and suspensions, facilitating the delivery of active pharmaceutical ingredients in various formulations.

Pharmacodynamics

Polysorbate does not exert pharmacological effects in the traditional sense, as it does not bind to specific receptors to elicit a physiological response. Instead, it plays a crucial role in modifying the physical properties of drug formulations, thereby enhancing drug delivery and absorption. Its ability to solubilize drugs enhances their bioavailability, particularly for poorly soluble compounds.

Pharmacokinetics

Polysorbate is generally considered to be non-toxic and is not absorbed to a significant extent when administered orally. It is metabolized by the liver and excreted primarily through the gastrointestinal tract. The pharmacokinetic profile may vary depending on the route of administration and the specific formulation in which it is used.

Adverse effects

• Allergic reactions
• Skin irritation
• Gastrointestinal disturbances

Precautions

• Use cautiously in patients with known allergies to polysorbates or related compounds
• Monitor for allergic reactions in susceptible individuals

Pregnancy

Polysorbate is generally considered safe for use during pregnancy, but consult with a healthcare provider for specific cases.

Breast-feeding

Polysorbate is considered safe during breastfeeding, but consult with a healthcare provider for individual advice.

Storage

Store at room temperature, away from direct sunlight and moisture.

Formulations

• Polysorbate 20
• Polysorbate 80

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

• Flatulence
• Bloating
• Gastroesophageal reflux disease
• Functional dyspepsia

Dosage

Children: For children, refer to the BNF for Children for specific dosing recommendations.

Adults: The usual adult dose is 40 to 125 mg taken after meals and at bedtime, as needed.

Mechanism of action

Simethicone is a surfactant that decreases the surface tension of gas bubbles in the gastrointestinal tract, facilitating their expulsion. It acts by forming a film of low surface tension that promotes the coalescence of mucus-surrounded gas bubbles, allowing for easier passage of gas.

Pharmacodynamics

Simethicone decreases the surface tension of gas bubbles in the gastrointestinal tract, facilitating their expulsion. Its effects are generally short-lived, as it is typically administered as needed. The therapeutic index is wide since it is not absorbed systemically, making it safe for use in various patient populations.

Pharmacokinetics

Simethicone is not systemically absorbed following oral administration, which contributes to its safety profile. Due to its lack of systemic absorption, specific pharmacokinetic parameters such as half-life, clearance, and volume of distribution are not applicable.

Pregnancy

Simethicone can be used during pregnancy as there are no known risks associated with its use.

Breast-feeding

Simethicone is considered safe to use during breastfeeding, as it is not absorbed systemically.

Storage

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

Formulations

• Oral suspension
• Chewable tablets
• Soft gels

Indications

• Food coloring agent
• Beverage coloring agent
• Cosmetic coloring agent

Dosage

Children: Refer to specific food product guidelines, as tartrazine is used as a coloring agent rather than a medication with a defined dosage.

Adults: Refer to specific food product guidelines, as tartrazine is used as a coloring agent rather than a medication with a defined dosage.

Mechanism of action

Tartrazine acts primarily as a colorant, providing a yellow hue to products. It is believed to exert its effects by interacting with proteins and other molecules in the food matrix to produce a stable color. The exact biochemical pathways of its action in the human body are not well-defined, but its primary role is as a dye rather than a pharmacologically active substance.

Pharmacodynamics

As a food dye, tartrazine does not have pharmacological properties in the traditional sense since it is not intended to exert therapeutic effects. However, it can cause hypersensitivity reactions in some individuals, particularly those with asthma or aspirin intolerance. The effects of tartrazine can vary based on individual sensitivities, with some people experiencing allergic reactions.

Pharmacokinetics

Tartrazine is absorbed from the gastrointestinal tract after ingestion. It is metabolized in the liver, and its metabolites are excreted primarily via the urine. The half-life of tartrazine in humans is not well-studied, but its rapid absorption and excretion suggest a short duration of action. Individuals with impaired renal function may experience altered pharmacokinetics.

Contra-indications

• Hypersensitivity to tartrazine or any of its components
• History of asthma or other allergic conditions in patients who are sensitive to tartrazine

Adverse effects

• Allergic reactions including urticaria and asthma exacerbation
• Headache
• Nausea
• Hyperactivity in children

Interactions

• May interact with other allergens, potentially exacerbating allergic reactions
• Use with caution in patients taking other medications that can cause allergic reactions

Precautions

• Caution in patients with a history of allergic reactions
• Monitor for signs of hypersensitivity, especially in asthmatic patients
• Not recommended for children with known sensitivities

Pregnancy

There are no adequate and well-controlled studies in pregnant women. Use only if clearly needed.

Breast-feeding

Caution is advised as it is unknown if tartrazine is excreted in human milk.

Storage

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

Formulations

• Powder for food coloring
• Liquid formulations for food and beverage products

Indications

• Used as a thickening agent in food products
• Utilized in pharmaceutical formulations as a stabilizer
• Employed in cosmetics for texture improvement
• Applied in industrial products for its viscosity properties

Dosage

Children: Refer to specific product guidelines for appropriate use. Xanthan is used in formulations as a thickener or stabilizer, and dosage should be evaluated based on the specific product and formulation.

Adults: Refer to specific product guidelines for appropriate use. Xanthan is typically used in small quantities as a thickener or stabilizer in food and pharmaceutical products.

Mechanism of action

Xanthan functions primarily as a thickener and stabilizer. It acts by interacting with water molecules to form a gel-like consistency, which enhances the texture and stability of products. Its unique rheological properties allow it to maintain viscosity under varying conditions, which is beneficial in food and pharmaceutical applications.

Pharmacodynamics

Xanthan's action is primarily physical rather than pharmacological. It does not exert a direct therapeutic effect but influences the delivery and stability of active ingredients in formulations. The gel formation and viscosity changes help ensure the uniform distribution of substances in liquid formulations, which can improve the effectiveness of the drug delivery.

Pharmacokinetics

As xanthan is a polysaccharide, it is not absorbed in the gastrointestinal tract when ingested. It passes through the digestive system largely unchanged. In terms of metabolism, xanthan is broken down by colonic bacteria, resulting in short-chain fatty acids. Its pharmacokinetic profile indicates that it has a low bioavailability due to its large molecular size and structure.

Pregnancy

There is insufficient data on the use of xanthan during pregnancy. Consult a healthcare professional before use.

Breast-feeding

There is insufficient data on the excretion of xanthan in human milk. Consult a healthcare professional before use.

Storage

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

Formulations

• Xanthan gum powder

Pregnancy

No specific data available, consult a healthcare professional.

Breast-feeding

No specific data available, consult a healthcare professional.

Storage

Store in a cool, dry place away from light.

Mechanism of action

The mechanism of action of levamisole as an antiparasitic agent appears to be tied to its agnositic activity towards the L-subtype nicotinic acetylcholine receptors in nematode muscles. This agonistic action reduces the capacity of the males to control their reproductive muscles and limits their ability to copulate. The mechanism of action of Levamisole as an anticancer drug in combination with fluorouracil is unknown. The effects of levamisole on the immune system are complex. The drug appears to restore depressed immune function rather than to stimulate response to above-normal levels. Levamisole can stimulate formation of antibodies to various antigens, enhance T-cell responses by stimulating T-cell activation and proliferation, potentiate monocyte and macrophage functions including phagocytosis and chemotaxis, and increase neutrophil mobility, adherence, and chemotaxis.

Pharmacodynamics

Levamisole is a synthetic imidazothiazole derivative that has been widely used in treatment of worm infestations in both humans and animals. As an anthelmintic, it probably works by targeting the nematode nicotinergic acetylcholine receptor. As an immunomodulator, it appears that Levamisole is an immunostimulant which has been shown to increase NK cells and activated T-cells in patients receiving this adjuvantly along with 5FU for Stage III colon cancer.

Mechanism of action

Simethicone is a surfactant that decreases the surface tension of gas bubbles in the gastrointestinal tract, more easily allowing gas to exit the body. The clinical use of simethicone is based on its antifoam properties. Silicone antifoams spread on the surface of aqueous liquids, forming a film of low surface tension and thus causing collapse of foam bubbles. Simethicone reportedly allows mucus-surrounded gas bubbles in the GI tract to coalesce and be expelled.

Pharmacodynamics

Simethicone decreases the surface tension of gas bubbles in the gastrointestinal tract, facilitating their expulsion. It has a short duration of action as it is generally given as needed, and a wide therapeutic index as it is not systemically absorbed.