Isotretinoin
Also known as Accutane, oral retinoid
The only drug that reliably produces long-term remission of severe acne. Serious enough that it demands a dermatologist, monitoring and genuine informed consent.
Highly dependent on insurance and country. Generic courses can be a few hundred dollars; uninsured US courses with monitoring run far higher.
How it works
An oral retinoid that shrinks sebaceous glands, drastically reduces sebum output, normalises follicular keratinisation and reduces C. acnes colonisation. The gland atrophy is what makes remission durable.
How it's used
Prescribed and monitored by a dermatologist, typically dosed by body weight toward a cumulative target dose over 5–8 months. Requires baseline and periodic blood work (lipids, liver enzymes) and, for anyone who can become pregnant, strict pregnancy prevention with regular testing.
Trade-offs
In favour
- Can produce permanent remission where every other treatment fails
- Resolves cystic and scarring acne that would otherwise leave permanent marks
- Well-defined, finite course rather than indefinite maintenance
Against
- Substantial side-effect burden
- Requires ongoing medical supervision and blood monitoring
- Severely drying — lips, eyes, skin and nasal mucosa
- Relapse possible, and some need a second course
Risks and side effects
- Extremely teratogenic — mandatory pregnancy prevention programmes exist for this reason
- Raised triglycerides and liver enzymes
- Dryness, epistaxis, myalgia, night vision changes
- Mood changes have been reported; discuss personal and family psychiatric history with your prescriber
How good is the evidence?
Decades of trial and registry data. Efficacy for severe nodulocystic acne is not seriously disputed; the debate is over dosing strategy and monitoring.
Sources
- Acne vulgaris management guidelinesAmerican Academy of Dermatology · 2024
- iPLEDGE pregnancy prevention programmeUS FDA
Sources point to guideline bodies and literature searches rather than single papers, so they stay accurate as the evidence moves.