DUOFILM LIQUID

Indications

• Metabolic acidosis
• Lactic acidosis
• Support in shock or severe dehydration
• Exercise physiology research

Dosage

Children: Refer to clinical guidelines for specific dosing recommendations based on the clinical condition being treated.

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

Mechanism of action

Lactic acid primarily functions by contributing to the acid-base balance in the body. It can serve as a substrate for gluconeogenesis in the liver and is utilized in the Cori cycle, where it is converted back to glucose. Furthermore, lactic acid can act as a signaling molecule in various physiological processes, influencing metabolism and cellular responses during hypoxic conditions.

Pharmacodynamics

Lactic acid dissociates into lactate and hydrogen ions in solution, which can lead to a decrease in pH (acidosis) when produced in excess. Its accumulation in the body is indicative of anaerobic metabolism, often observed during intense exercise or in conditions of oxygen deprivation. The body can buffer the effects of lactic acid through bicarbonate and other mechanisms, maintaining homeostasis.

Pharmacokinetics

Lactic acid is rapidly absorbed and distributed throughout the body. It is metabolized primarily in the liver, where it can be converted to glucose or further metabolized to carbon dioxide and water. The elimination half-life of lactate varies depending on the metabolic state of the individual and the presence of underlying conditions. Renal function also plays a role in the clearance of lactate from the body.

Adverse effects

• Nausea
• Vomiting
• Abdominal pain
• Diarrhea
• Hypersensitivity reactions

Precautions

• Use with caution in patients with renal impairment
• Monitor for signs of metabolic acidosis
• Caution in patients with liver disease

Pregnancy

Lactic acid is generally regarded as safe, but clinical use should be evaluated on a case-by-case basis during pregnancy.

Breast-feeding

Considered safe for use during breastfeeding, but consult healthcare provider for individual cases.

Storage

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

Formulations

• Lactic acid injection
• Lactic acid oral solution

Indications

• Acne vulgaris
• Psoriasis
• Warts
• Seborrheic dermatitis
• Dandruff
• Hyperkeratotic conditions

Dosage

Children: Refer to appropriate paediatric guidelines as per product formulation.

Adults: Topical application varies by formulation; follow specific product guidelines.

Mechanism of action

Salicylic acid exerts its effects by penetrating the skin and dissolving the bonds that hold skin cells together, which facilitates the removal of the outer layer of skin. It also has anti-inflammatory properties that help reduce the redness and swelling associated with acne and other skin disorders. Salicylic acid is known to inhibit the enzyme cyclooxygenase (COX), leading to decreased production of inflammatory mediators.

Pharmacodynamics

Salicylic acid demonstrates keratolytic effects by softening and loosening the outer layer of skin. Its ability to penetrate hair follicles allows it to address acne at its source by clearing plugged pores. The anti-inflammatory action reduces the inflammatory response in acne lesions, leading to a decrease in swelling and redness. The concentration of salicylic acid used affects its effectiveness; higher concentrations are typically utilized for more severe conditions.

Pharmacokinetics

Salicylic acid is absorbed through the skin, with systemic absorption being minimal when used topically. The onset of action can vary depending on the formulation and concentration used. The metabolic pathways primarily involve conjugation with glycine or glucuronic acid in the liver, leading to excretion via the kidneys. Its half-life can vary, but topical formulations are designed for localized effects, minimizing systemic exposure.

Contra-indications

• Hypersensitivity to salicylic acid or any of its components
• Active peptic ulcer disease
• Severe liver or kidney impairment
• Children and adolescents with viral infections (risk of Reye's syndrome)

Adverse effects

• Gastrointestinal disturbance (nausea, vomiting, dyspepsia)
• Tinnitus or hearing loss (especially at high doses)
• Allergic reactions (including rash or urticaria)
• Skin irritation or burning sensation (when used topically)
• Respiratory alkalosis (in cases of overdose)

Interactions

• Increased risk of bleeding when used with anticoagulants such as warfarin
• Potential interaction with methotrexate, leading to increased toxicity
• May decrease the efficacy of certain antihypertensive medications
• Use with caution in conjunction with other non-steroidal anti-inflammatory drugs (NSAIDs)

Precautions

• Caution in patients with asthma or a history of asthma
• Use with caution in patients with a history of gastrointestinal disorders
• Regular monitoring of renal function may be necessary in long-term use
• Avoid in patients with known salicylate intolerance

Pregnancy

Salicylic acid is generally avoided during pregnancy, especially in the third trimester, due to potential risks of fetal harm.

Breast-feeding

Salicylic acid is excreted in breast milk; caution is advised when using topically or systemically.

Storage

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

Formulations

• Topical ointment or gel
• Liquid solution for topical use
• Tablets and capsules for systemic use