Isotretinoin Orifarm (Isotretinoin)

Isotretinoin is a retinoid that targets severe acne conditions, reducing lesion formation and inflammation.

• Severe recalcitrant nodular acne: decreases nodule count and promotes skin clearance.
• Severe cystic acne: reduces cyst formation and improves overall acne severity.
• Severe acne vulgaris (treatment‑resistant): helps achieve remission when other therapies fail.

• Isotretinoin binds to nuclear retinoic acid receptors, modulating gene expression that leads to reduced sebaceous gland size and sebum production, inhibition of follicular keratinization, and anti‑inflammatory effects, thereby addressing the pathogenic factors of severe acne.

Isotretinoin may cause a range of adverse reactions, which are categorized by frequency and severity.

Common Side Effects

• Dry skin: increased epidermal dryness and scaling.
• Cheilitis: cracking and inflammation of the lips.
• Dry eyes: reduced tear production causing irritation.
• Photosensitivity: heightened skin reaction to sunlight.
• Elevated liver enzymes: mild transaminase increase.
• Hypertriglyceridemia: rise in blood triglyceride levels.

Serious or Rare Side Effects

• Severe depression or suicidal ideation: mood changes requiring immediate evaluation.
• Inflammatory bowel disease: onset or exacerbation of Crohn's disease or ulcerative colitis.
• Teratogenic effects: birth defects if exposure occurs during pregnancy.
• Pseudotumor cerebri: increased intracranial pressure presenting with headache and visual changes.
• Severe hyperlipidemia: marked elevation of cholesterol or triglycerides.

Before initiating therapy, clinicians should assess specific safety considerations.

• Pregnancy: contraindicated; ensure effective contraception throughout treatment and for one month after discontinuation.
• Teratogenicity: avoid use in women who are or may become pregnant.
• Liver function: monitor hepatic enzymes regularly during therapy.
• Lipid profile: check triglycerides and cholesterol before and during treatment.
• Vitamin A: avoid concurrent vitamin A supplements to prevent additive toxicity.
• Store at ambient temperature: keep below 25°C, in the original packaging, and protect from moisture.

Isotretinoin can interact with several drug classes, requiring careful management.

Major Interactions (Avoid)

• Tetracycline antibiotics: increased risk of intracranial hypertension.
• Vitamin A supplements: additive retinoid toxicity.

Moderate Interactions (Monitor Closely)

• Oral contraceptives: may reduce isotretinoin efficacy; monitor acne control.
• Other retinoids (e.g., acitretin): cumulative toxicity risk.
• Azole antifungals (e.g., ketoconazole): may raise isotretinoin plasma levels.