Isotretinoin
13-cis-retinoic acid (Roche Roaccutane). Gold standard for severe nodulocystic acne. FDA category X due to severe teratogenicity – iPLEDGE program mandatory.
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Isotretinoin vs TretinoinWHAT IS ISOTRETINOIN?
Detailed overview
Isotretinoin (Roche Roaccutane / Accutane, FDA 1982) is the gold-standard treatment for severe nodulocystic acne. 13-cis-retinoic acid (vitamin A metabolite) causes sebaceous gland atrophy, sebum production reduction, and P. acnes growth inhibition. EXTREME TERATOGENICITY (FDA category X) – every female patient must enroll in pregnancy prevention program (USA: iPLEDGE, EU: similar national programs). 2 negative pregnancy tests before start, 2 forms contraception mandatory, monthly testing. Layton 2009 (PMID 20436884) 6-month course produces sustained remission in ~80% of cases. Side effect profile SIGNIFICANT: dryness (mouth, eye, skin, lip), muscle pain, liver function disturbance, depression risk.
ATC code
D10BA01
Prescription
Prescription only (Rx), iPLEDGE/pregnancy prevention
Mechanism
Retinoid (RAR agonist), sebaceous gland suppression
Half-life
~21 h (active 4-oxo metabolite ~24 h)
Onset
4-8 weeks (initial), 15-20 weeks full course
Data console
Lab data
Safety
Side effects, stop signs, contraindications
Side effects · 7
- Cheilitis and generalized mucocutaneous dryness in nearly all patients (~90%): chapped lips, dry nose (nosebleeds), dry eyes and skin.
- Psychiatric effects: low mood, depression, rarely suicidal ideation – an official FDA warning; any mood change must be reported immediately.
- Blood lipid rise: triglycerides and cholesterol can increase (rare pancreatitis risk), so monthly lipid panel monitoring is mandatory.
- Hepatic dysfunction: elevated ALT/AST transaminases, so regular liver-enzyme checks are required during the course.
- Musculoskeletal complaints: muscle and joint pain, back pain, especially with physical exertion; common during treatment.
- Increased photosensitivity and an initial acne flare (purging) early in the course, plus slower wound healing.
- Rare but serious: pseudotumor cerebri (benign intracranial hypertension) with persistent headache and visual disturbance, plus reduced night vision.
Contraindications · 3
- PREGNANCY (FDA category X – severe craniofacial, CV, CNS malformations)
- Childbearing age without contraception
- Hypervitaminosis A, severe hepatic disease
Related Pharmaceuticals
Same therapeutic category
Studies
Related research and clinical findings
Isotretinoin: state of the art treatment for acne vulgaris
Layton AM.
Association of inflammatory bowel disease incidence with isotretinoin usage: A meta-analysis and systematic review.
Ahmed A, Liaquat A, Raza S
Risk of Suicide and Psychiatric Disorders Among Isotretinoin Users: A Meta-Analysis.
Tan NKW, Tang A, MacAlevey NCYL
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Educational drug info from official sources (PubMed, FDA, EMA). Does NOT replace medical consultation or the SmPC. Talk to your doctor!
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The information here is for educational and scientific purposes only. Medication use requires medical consultation and a prescription. The indications, dose ranges, and side effects listed here do NOT replace the official Summary of Product Characteristics (SmPC) or consultation with a physician. Do not start or stop any medication on your own. In an emergency, call your local emergency number.