DEFLAM RUB

Indications

• Topical analgesic for muscle and joint pain
• Relief of minor aches and pains
• Treatment of superficial skin irritations

Dosage

Adults: For topical use, apply to the affected area not more than 3 to 4 times daily. Refer to specific product instructions for concentration and formulation.

Mechanism of action

Camphor activates the transient receptor potential (TRP) channel TRPV3 and has been shown to also activate TRPV1 at higher concentrations. This activation is enhanced under conditions that mimic inflammation, as it is linked to phospholipase C-coupled receptor stimulation. Although camphor activates TRPV1 less effectively than capsaicin, it desensitizes TRPV1 more rapidly and completely, contributing to its analgesic effects. Camphor's interaction with these receptors leads to a sensation of warmth and relief from pain, making it effective in topical applications.

Pharmacodynamics

Camphor exhibits local analgesic and anti-inflammatory effects when applied topically. It produces a warming sensation due to its action on sensory neurons, which can help to alleviate pain. The activation of TRPV1 and TRPV3 channels results in a complex modulation of sensory nerve signaling, leading to both excitatory and inhibitory effects on pain perception. Its ability to desensitize TRPV1 may contribute to the reduction of pain sensation over time with repeated application.

Pharmacokinetics

When applied topically, camphor is absorbed through the skin, though its systemic absorption is minimal. It is metabolized in the liver, and its metabolites are excreted primarily in urine. The onset of action is typically rapid due to its local effects, while the duration of action can vary based on the formulation and concentration used. Care should be taken to avoid excessive application to prevent potential systemic effects.

Pregnancy

Camphor should be avoided during pregnancy due to potential risks to the fetus.

Breast-feeding

Camphor is excreted in breast milk and should be used with caution while breastfeeding.

Storage

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

Formulations

• Topical ointments
• Liniments
• Balms

Indications

• Type 2 diabetes mellitus
• Metabolic syndrome
• Dyslipidemia
• Inflammatory disorders
• Antioxidant support

Dosage

Children: Refer to established guidelines for specific dosing; pediatric use is not well standardized and should be approached with caution.

Adults: Refer to established guidelines for specific dosing; typically, doses range from 1 to 6 grams of cinnamon powder per day.

Mechanism of action

Cinnamon contains bioactive compounds such as cinnamaldehyde, which may enhance insulin sensitivity and improve glucose uptake in cells. It may also exert antioxidant effects and reduce inflammation by modulating various signaling pathways, including the NF-kB pathway.

Pharmacodynamics

The pharmacodynamic effects of cinnamon include modulation of glucose and lipid metabolism, anti-inflammatory effects, and antioxidant activity. Cinnamaldehyde has been shown to activate insulin signaling pathways, thereby improving insulin sensitivity. Additionally, cinnamon may influence the expression of genes involved in glucose metabolism.

Pharmacokinetics

Cinnamon is generally well absorbed when ingested. The bioavailability of its active compounds can vary based on the formulation and method of consumption. Metabolism occurs in the liver, where compounds such as cinnamaldehyde may be transformed into various metabolites. The elimination half-life of cinnamon's active components is not well defined but is expected to vary among individuals.

Adverse effects

• Allergic reactions
• Skin irritation
• Gastrointestinal upset

Interactions

• May enhance the effects of anticoagulants
• Potential interaction with antidiabetic medications

Precautions

• Use with caution in individuals with known allergies to cinnamon or related species
• Monitor blood glucose levels in diabetic patients

Pregnancy

Cinnamon is generally considered safe in food amounts, but high doses should be avoided.

Breast-feeding

Cinnamon in food amounts is likely safe, but high doses should be avoided.

Storage

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

Formulations

• Cinnamon powder
• Cinnamon oil
• Cinnamon extract

Dosage

Children: Refer to specific formulation guidelines as excipients are not dosed individually.

Adults: Refer to specific formulation guidelines as excipients are not dosed individually.

Mechanism of action

Excipients do not have a pharmacological mechanism of action in the way active drugs do; instead, they facilitate the delivery and absorption of the active pharmaceutical ingredients (APIs) in the body, improving the overall pharmacokinetics and bioavailability of the medication.

Pharmacodynamics

As excipients are inactive, they do not have pharmacodynamic properties. However, the choice of excipient can influence the release profile of the active ingredient, alter the drug's stability, and affect the solubility and bioavailability of the drug, which are critical for ensuring that the intended therapeutic effects are achieved.

Pharmacokinetics

Excipients generally do not undergo pharmacokinetic processes like absorption, distribution, metabolism, and excretion as active drugs do. They are usually considered inert, but their physical and chemical properties can influence the pharmacokinetics of the active ingredients they accompany. For example, some excipients may enhance the solubility of the active ingredient, facilitating better absorption in the gastrointestinal tract.

Pregnancy

Safety during pregnancy has not been established for all excipients. Some may pose risks while others are generally considered safe. Consultation with healthcare professionals is advised.

Breast-feeding

The safety of excipients during breastfeeding varies depending on the specific excipient. It is essential to consult healthcare professionals.

Storage

Excipients should be stored according to the specific requirements of the formulation they are a part of. Generally, they should be kept in a cool, dry place away from light.

Indications

• Dyspepsia
• Irritable bowel syndrome
• Nausea
• Gastrointestinal spasms
• Headaches
• Muscle pain relief

Dosage

Children: Refer to pediatric dosing guidelines, as peppermint preparations may not be suitable for all age groups and specific formulations should be used with caution.

Adults: Refer to established guidelines or product-specific recommendations, as doses can vary based on formulation and intended use.

Mechanism of action

The active compounds in Mentha piperita, particularly menthol, exert their effects primarily through activation of TRPM8 (transient receptor potential melastatin 8) channels, which are involved in the sensation of coolness and pain relief. Menthol has local anesthetic properties and may also exhibit mild antispasmodic effects on smooth muscle.

Pharmacodynamics

Mentha piperita has been shown to produce a cooling sensation and analgesic effects. Its antispasmodic properties can help alleviate muscle spasms in the gastrointestinal tract, thereby reducing symptoms of dyspepsia and irritable bowel syndrome. Additionally, peppermint oil may have antimicrobial properties against certain pathogens, contributing to gastrointestinal health.

Pharmacokinetics

Peppermint oil is rapidly absorbed and metabolized. Its main component, menthol, is primarily metabolized in the liver and is excreted in urine. The onset of action varies depending on the route of administration, with topical applications providing localized relief more quickly than oral formulations. The half-life of menthol can vary but generally ranges from 1 to 2 hours.

Pregnancy

There is insufficient data on the use of mentha piperita (peppermint) during pregnancy. It is advisable to consult a healthcare provider before use.

Breast-feeding

Mentha piperita is generally considered safe during breastfeeding, but it is recommended to consult a healthcare provider.

Storage

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

Formulations

• Essential oil
• Tea
• Capsules
• Topical preparations

Indications

• Musculoskeletal pain
• Arthritis
• Tendinitis
• Back pain
• Muscle strains and sprains

Dosage

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

Adults: Apply to the affected area, usually 3 to 4 times daily as needed, ensuring not to exceed the recommended amount.

Mechanism of action

Counter-irritation is thought to be effective at alleviating musculoskeletal pain as the irritation of the sensory nerve endings alters or offsets pain in the underlying muscle or joints served by the same nerves. When applied topically, methyl salicylate penetrates the skin and underlying tissues, where it reversibly inhibits cyclooxygenase enzyme and prevents the production of inflammatory mediators such as prostaglandin and thromboxane A2.

Pharmacodynamics

Methyl salicylate relieves musculoskeletal pain in muscles, joints, and tendons by causing irritation and reddening of the skin due to dilated capillaries and increased blood flow. It acts as a rubefacient and skin irritant, providing a soothing sensation of warmth. Its pharmacological profile is similar to that of aspirin and other NSAIDs.

Pharmacokinetics

Methyl salicylate is absorbed through the skin upon topical application, where it exerts its effects locally. It undergoes metabolism primarily in the liver, and its metabolites are excreted via urine. The onset of action is relatively rapid, given the local application.

Adverse effects

• Skin irritation
• Allergic reactions
• Burning sensation at the application site

Precautions

• Avoid contact with eyes and mucous membranes
• Do not apply to broken or irritated skin
• Use with caution in patients with sensitive skin or allergies

Pregnancy

Data on the safety of wintergreen during pregnancy is limited. Consult a healthcare professional before use.

Breast-feeding

Limited data available; consult a healthcare professional before use.

Storage

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

Formulations

• Topical ointment
• Topical gel
• Liniment

Mechanism of action

Camphor is a naturally occurring compound that is used as a major active ingredient of balms and liniments supplied as topical analgesics. ... Capsaicin and menthol, two other topically applied agents widely used for similar purposes, are known to excite and desensitize sensory nerves by acting on two members of transient receptor potential (TRP) channel superfamily: heat-sensitive TRP vanilloid subtype 1 (TRPV1) and cold-sensitive TRP channel M8, respectively. Camphor has recently been shown to activate TRPV3, and here /investigators/ show that camphor also activates heterologously expressed TRPV1, requiring higher concentrations than capsaicin. Activation was enhanced by phospholipase C-coupled receptor stimulation mimicking inflamed conditions. Similar camphor-activated TRPV1-like currents were observed in isolated rat DRG neurons and were strongly potentiated after activation of protein kinase C with phorbol-12-myristate-13-acetate. Camphor activation of rat TRPV1 was mediated by distinct channel regions from capsaicin, as indicated by camphor activation in the presence of the competitive inhibitor capsazepine and in a capsaicin-insensitive point mutant. Camphor did not activate the capsaicin-insensitive chicken TRPV1. TRPV1 desensitization is believed to contribute to the analgesic actions of capsaicin. /The authors/ found that, although camphor activates TRPV1 less effectively, camphor application desensitized TRPV1 more rapidly and completely than capsaicin. Conversely, TRPV3 current sensitized after repeated camphor applications, which is inconsistent with the analgesic role of camphor. /Investigators/ also found that camphor inhibited several other related TRP channels, including ankyrin-repeat TRP 1 (TRPA1). The camphor-induced desensitization of TRPV1 and block of TRPA1 may underlie the analgesic effects of camphor.

Mechanism of action

Counter-irritation is thought to be effective at alleviating musculoskeletal pain as the irritation of the sensory nerve endings is thought to alter or offset pain in the underlying muscle or joints that are served by the same nerves. This is thought to mask the underlying musculoskeletal pain and discomfort. When applied topically, methyl salicylate is thought to penetrate the skin and underlying tissues where it reversibly inhibits cyclooxygenase enzyme and locally and peripherally prevents the production of inflammatory mediators such as prostaglandin and thromboxane A2.

Pharmacodynamics

Methyl salicylate relieve musculoskeletal pain in the muscles, joints, and tendons by causing irritation and reddening of the skin due to dilated capillaries and increased blood flow. It is pharmacologically similar to aspirin and other NSAIDs but as a topical agent it primarily acts as a rubefacient and skin irritant. Counter-irritation is believed to cause a soothing sensation of warmth.