RUBEM CREAM

Indications

• Topical pain relief for conditions such as osteoarthritis and neuropathic pain
• Management of postherpetic neuralgia
• Supportive treatment for muscle and joint pain
• Stimulation of digestion and appetite

Dosage

Children: Dosage for pediatric patients should be determined by a healthcare provider, taking into consideration

Adults: Topical formulations generally recommend application to the affected area, with specific dosing instructions provided by the product label. For oral supplements, follow the manufacturer's guidelines or consult a healthcare professional.

Mechanism of action

Capsaicin, the main active component in Capsicum, exerts its effects by binding to the TRPV1 (transient receptor potential vanilloid 1) receptor, which is a cation channel involved in the transmission of pain and heat sensations. This binding leads to the depolarization of sensory neurons, resulting in the release of substance P, a neuropeptide associated with pain signaling. Continuous exposure to capsaicin results in the desensitization of these receptors, leading to decreased pain perception over time.

Pharmacodynamics

The analgesic properties of Capsicum are attributed to its ability to alter the perception of pain. Capsaicin induces a sensation of warmth and pain initially, which is followed by a prolonged analgesic effect due to the depletion of substance P from the nerve endings. Additionally, Capsicum may exhibit anti-inflammatory effects through the modulation of cytokine release and inhibition of inflammatory pathways, contributing to its therapeutic applications in pain management and inflammatory conditions.

Pharmacokinetics

Capsaicin is poorly absorbed when ingested orally, but it can be effectively absorbed through the skin when applied topically. After application, it is metabolized by the liver, and its metabolites are excreted primarily through the kidneys. The onset of action for topical preparations can vary, with effects often observed within hours. The duration of action may last from several hours to days, depending on the formulation and the area of application.

Adverse effects

• Burning sensation at the site of application
• Skin irritation or rash
• Gastrointestinal upset (if ingested)
• Allergic reactions

Precautions

• Avoid contact with eyes and mucous membranes
• Use caution in patients with sensitive skin
• Consult a healthcare professional before use in patients with underlying health conditions

Pregnancy

Capsicum is generally considered unsafe during pregnancy due to potential effects on the fetus. Pregnant women should consult a healthcare provider before use.

Breast-feeding

Capsicum should be used with caution during breastfeeding as it may affect milk production or flavor.

Storage

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

Formulations

• Topical ointments or creams
• Capsules
• Powdered form for oral use

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

• Pellagra
• Hyperlipidaemia
• Nicotinic acid deficiency
• As a dietary supplement

Dosage

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

Adults: Refer to BNF for specific adult dosing guidelines.

Mechanism of action

Nicotinate functions primarily as a precursor to nicotinamide adenine dinucleotide (NAD) and nicotinamide adenine dinucleotide phosphate (NADP), which are essential for various enzymatic reactions, including those involved in energy metabolism and DNA repair. It is involved in multiple biosynthetic pathways including nicotine biosynthesis and pyridine nucleotide cycling.

Pharmacodynamics

Nicotinate's pharmacodynamic properties are attributed to its role in redox reactions as a coenzyme. It enhances the activity of dehydrogenases and participates in the synthesis of fatty acids and cholesterol, influencing lipid metabolism. Additionally, it has vasodilatory effects, possibly due to its ability to release prostaglandins, which can lead to improved blood flow.

Pharmacokinetics

Nicotinate is well absorbed from the gastrointestinal tract. It is extensively metabolized in the liver, where it is converted into its active form, NAD. The elimination half-life varies but is generally around 20 to 45 minutes. Renal excretion plays a significant role in the elimination of nicotinate and its metabolites.

Pregnancy

There is limited information available on the safety of nicotinate during pregnancy. Consult healthcare professionals for specific guidance.

Breast-feeding

Limited data on the excretion of nicotinate in breast milk. Consult healthcare professionals for advice.

Storage

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

Indications

• Antimicrobial treatment
• Antioxidant therapy
• Flavoring agent in food
• Natural preservative
• Traditional medicine applications

Dosage

Children: Refer to specific product guidelines or consult a healthcare professional for appropriate dosing.

Adults: Refer to specific product guidelines or consult a healthcare professional for appropriate dosing.

Mechanism of action

The mechanism of action of oleoresin varies depending on its source and the specific compounds it contains. Generally, oleoresins exhibit antimicrobial activity, which may involve the disruption of microbial cell membranes or interference with metabolic processes. Additionally, some components may have anti-inflammatory and antioxidant effects, contributing to their therapeutic potential.

Pharmacodynamics

Oleoresins exhibit a range of pharmacodynamic effects, including antimicrobial, antioxidant, and anti-inflammatory activities. The specific effects will depend on the source of the oleoresin and its chemical composition. These properties are attributed to the various phytochemicals present, such as terpenes, phenolics, and other bioactive compounds, which can modulate biological pathways and influence physiological responses.

Pharmacokinetics

The pharmacokinetics of oleoresin are not well-defined due to the complexity of its composition. Generally, the absorption and metabolism of oleoresins can vary widely based on the individual compounds they contain. Lipophilic components may be absorbed through the gastrointestinal tract and metabolized in the liver, while other components may undergo different metabolic pathways. The elimination half-life is also variable, reflecting the diverse nature of its constituents.

Pregnancy

Safety in pregnancy has not been established, consult healthcare provider.

Breast-feeding

Consult healthcare provider before use during breastfeeding.

Storage

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

Indications

• Muscle pain
• Joint pain
• Arthritis
• Strains
• Sprains
• Tendonitis

Dosage

Children: Refer to specific product instructions or guidelines for dosing information.

Adults: Refer to specific product instructions or guidelines for dosing information.

Mechanism of action

Salicylate acts by inhibiting the enzyme cyclooxygenase (COX), which is involved in the conversion of arachidonic acid to prostaglandins. Prostaglandins are mediators of inflammation and pain. By reducing their production, salicylate decreases inflammation, pain, and swelling at the site of application.

Pharmacodynamics

Salicylate exhibits anti-inflammatory, analgesic, and antipyretic properties. When applied topically, it can provide localized relief from pain and inflammation without significant systemic absorption. The onset of action is typically within a short period, depending on the formulation and concentration of salicylate in the cream.

Pharmacokinetics

Due to its topical application, salicylate's systemic absorption is minimal. The pharmacokinetics may vary depending on the formulation, with percutaneous absorption being more significant in areas where the skin is thin or damaged. The half-life of salicylate can vary, but systemic effects are generally limited when used topically. Metabolism primarily occurs in the liver, and excretion is mainly via the kidneys.

Contra-indications

• Hypersensitivity to salicylates or any component of the formulation
• Active peptic ulcer disease
• Severe liver or kidney impairment
• Asthma exacerbated by salicylate use

Adverse effects

• Skin irritation or rash at the application site
• Burning sensation
• Allergic reactions including urticaria
• Systemic effects in cases of excessive use, such as nausea or gastrointestinal discomfort

Interactions

• Caution when used concurrently with other topical agents, as they may enhance irritation
• Potential interaction with anticoagulants, increasing the risk of bleeding when salicylates are absorbed systemically

Precautions

• Avoid application on broken or inflamed skin
• Use with caution in patients with a history of asthma or allergic reactions
• Monitor for signs of systemic absorption, especially in children

Pregnancy

Not recommended during pregnancy unless clearly needed, particularly in the third trimester due to potential risks to the fetus.

Breast-feeding

Use with caution, as salicylates can be excreted in breast milk and may affect the nursing infant.

Storage

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

Formulations

• Topical cream containing salicylate
• Various concentrations available depending on formulation