At a glance
Effects
- Severe acne clearance: Produces sustained, often permanent remission of severe nodular and cystic acne — the only treatment addressing all four pathogenic factors [1][3].
- Sebum reduction: Dramatically reduces sebum output by shrinking sebaceous glands; this effect reflects permanent structural changes to the glands at standard doses [3].
- Normalised skin-cell turnover: Corrects abnormal keratinisation, reducing comedone formation and pore blockage [1].
- Anti-inflammatory action: Suppresses production of pro-inflammatory cytokines and interleukins, reducing tissue inflammation in acne lesions [2].
- Off-label dermatological uses: Used off-label for rosacea, photoaging (low-dose), hidradenitis suppurativa, and certain cutaneous malignancies [6].
Oral synthetic retinoid (vitamin A derivative)
~18–22 hours (parent drug); major metabolite 4-oxo-isotretinoin ~38 h [1][3]
Oral (capsule, taken with food) [1]
15–20 weeks at 0.5–1.0 mg/kg/day [1][3]
LFT elevation in up to 15% of users; triglycerides commonly raised [1]
About Isotretinoin
Every point here is drawn from public medical and harm-reduction sources. A bracketed number after a claim — like [1]— is a reference: tap it to open the exact source it's based on (numbered list at the bottom). It is not a rating or score. Educational information, not medical advice.
Product specifics
- Est. delivery
- 3–7 business days · EU tracked
Product details as stated by the vendor (claims, not independently verified). Delivery is our standard EU estimate.
What it is
Isotretinoin (13-cis-retinoic acid) is an oral synthetic retinoid derived from vitamin A, used as a highly effective prescription treatment for severe, recalcitrant nodular acne that has not responded to conventional therapies such as systemic antibiotics [1]. It is also used off-label for certain skin cancers and other dermatological conditions [2].
How it works
Isotretinoin is the only available acne treatment that targets all four major pathogenic processes simultaneously: it dramatically reduces sebaceous gland size and sebum production, normalises keratinisation (skin-cell shedding) to prevent pore blockage, exerts direct anti-inflammatory effects by suppressing pro-inflammatory cytokines, and indirectly suppresses Cutibacterium acnes by eliminating the oily environment in which it thrives [1][3]. Its precise molecular mechanism is not fully established, but it is believed to induce apoptosis (programmed cell death) in sebaceous gland cells and may be converted intracellularly to metabolites that act on retinoic acid nuclear receptors (RAR/RXR) [4][5].
Risks & side effects
Most important: Isotretinoin is severely teratogenic — it can cause major congenital malformations, spontaneous abortion, and premature birth if taken during pregnancy, and strict pregnancy prevention programmes (two forms of contraception, monthly pregnancy tests) are legally mandatory in most countries [1][7]. This is the single most important risk and an absolute contraindication.
Common
- Cheilitis (dry, cracked lips) — the most universal side effect [6]
- Xerosis (dry skin and facial redness) [6]
- Dry, irritated eyes and meibomian gland dysfunction [8]
- Nosebleeds (epistaxis) [6]
- Arthralgia and myalgia (joint and muscle pain) [7]
- Headaches [7]
- Transient hair thinning / telogen effluvium [7]
- Elevated liver enzymes (up to 15% of patients, usually transient) [1]
- Elevated serum triglycerides / hypertriglyceridaemia [5]
Serious
- Severe teratogenicity — absolute contraindication in pregnancy [1]
- Psychiatric effects: depression, mood changes, rarely suicidal ideation — pre-treatment mental health screening required [9]
- Significant liver enzyme elevation (>5× ULN) requiring discontinuation [1]
- Severe hypertriglyceridaemia leading to pancreatitis risk [10]
- Night blindness and other visual disturbances [8]
- Inflammatory bowel disease (IBD) association reported [5]
- Pseudotumour cerebri (intracranial hypertension), risk greatly increased with concurrent tetracyclines [10]
Safety & harm reduction
- Pregnancy or those who may become pregnant — absolute contraindication due to severe teratogenicity [1]
- Breastfeeding mothers [10]
- Known hypersensitivity to isotretinoin, retinoids, or parabens (brand-dependent) [10]
- Pre-existing hypervitaminosis A [10]
- Severe hepatic impairment [10]
- Severe, uncontrolled hyperlipidaemia [10]
- Fasting serum lipids (triglycerides, cholesterol) at baseline, 1 month, then every 3 months [9]
- Liver function tests (AST, ALT) at same intervals; discontinue if >5× ULN [1]
- Full blood count at baseline [7]
- Pregnancy tests monthly throughout treatment (females of childbearing potential) [7]
- Mental health screening before treatment and at each visit — monitor for depression, mood changes, suicidal ideation [9]
- Ophthalmological review if visual symptoms develop (night blindness, dry eye, photophobia) [8]
- Tetracycline antibiotics (e.g. doxycycline, minocycline) — concurrent use is contraindicated due to greatly increased risk of pseudotumour cerebri (benign intracranial hypertension) [10]
- Vitamin A supplements — additive toxicity (hypervitaminosis A); avoid combination [10]
- St John's Wort — may reduce oral contraceptive efficacy, increasing pregnancy risk [9]
- Alcohol — may enhance hypertriglyceridaemia and hepatotoxicity risk [9]
- Systemic corticosteroids — potential increased risk of osteoporosis with prolonged use [10]
- Progestin-only ('mini-pill') contraceptives — possible reduced efficacy; two reliable methods recommended [7]
- Take every dose with a fat-containing meal to optimise absorption (bioavailability can double when taken fed vs fasted) [3]
- Take with a full glass of water to prevent oesophageal irritation [1]
- Use high-factor SPF daily — skin sensitivity to UV is significantly increased [6]
- Avoid waxing, laser, and dermabrasion procedures during treatment and for 6 months after — wound healing is impaired [6]
- Do not donate blood during treatment or for one month after (teratogenic risk to transfusion recipients) [7]
- All females of childbearing potential must enrol in a pregnancy prevention programme (e.g. iPLEDGE in the US) with two simultaneous forms of contraception [7]
- Discontinue at least one month before any planned pregnancy [7]
Dosage context
Physician-prescribed doses typically start at 0.5 mg/kg/day and are titrated up to 1.0 mg/kg/day based on patient tolerance, given in two divided doses for 15–20 weeks [1]. Total cumulative target dose is generally 120–150 mg/kg to minimise relapse [3]. These are prescription-only, clinician-supervised figures — not self-dosing guidance. Lower 'low-dose' regimens (e.g. 0.25 mg/kg/day or 20 mg on alternate days) are used off-label; evidence is limited and sources disagree on equivalency.
Sources
- 1.StatPearls — Isotretinoin (NCBI Bookshelf)
- 2.PMC — The use of isotretinoin in acne (NIH)
- 3.Synapse/Patsnap — Mechanism of Isotretinoin
- 4.PubMed — Isotretinoin: Mechanism of Action and Patient Selection
- 5.Acta Dermato-Venereologica — Apoptosis and isotretinoin pharmacological action
- 6.PMC — Ocular surveillance during isotretinoin (NIH 2025)
- 7.ANMC Guidelines for Isotretinoin (Accutane)
- 8.PMC — Acne Transcriptomics and isotretinoin treatment (NIH)
- 9.The Pharmaceutical Journal — Isotretinoin use: best practice
- 10.MedCentral — Isotretinoin: uses, dosing, warnings, adverse events
- 11.PubMed — Clinical pharmacokinetics of the retinoids (Lucek et al.)
This information is provided for educational and harm-reduction purposes only. It is not medical advice. These substances can carry serious health risks; effects and safe use vary by individual. Consult a qualified healthcare professional before use. Legal status varies by country — it is your responsibility to know your local law. We do not encourage misuse.
Other options for Isotretinoin· 3 offers
Same compound from different labs/brands and pack sizes. Tap a row to switch brand — the price and buy button update instantly.
This compound comes in different forms (e.g. injectable vs oral vs topical). Cost per mg is only comparable within the same form.
| Brand | Form | Strength | Pack | Price | Per mg |
|---|---|---|---|---|---|
GenericSelected | blister-pack | 20 mg/tab | 30 tab | 43,90 € | ★€0.073/mg |
Driada | — | — | 48,90 € | — | |
Generic | blister-pack | 20 mg/tab | 60 tab | 119,99 € | €0.100/mg |