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Isotretinoin

AEMPS

Systemic retinoid (vitamin A derivative)

ATC code: D10BA01

Brand names: Accutane, Absorica, Claravis

Updated · Methodology

Marketing claims without evidence base

The drug is promoted for these uses outside international guidelines. Each entry below is analyzed against AEMPS, FDA, EMA, Cochrane and major RCTs.

F

Anti-aging and longevity

Not recommended

Isotretinoin is an oral retinoid. It is prescribed for severe nodular acne vulgaris and for moderate acne unresponsive to other treatments ( 2020, 2023, AEMPS Ficha Técnica). In anti-aging practice, isotretinoin is prescribed for anti-aging of the skin and for occasional inflammatory acne lesions without confirmed moderate-to-severe disease. In people with mild acne, the risk profile is not justified. The drug has serious risks: severe teratogenicity ( boxed warning, mandatory iPLEDGE program with dual contraception for women of reproductive age), hepatotoxicity, hyperlipidemia, skin and mucosal xerosis, cheilitis, depression and described suicidal-ideation risk, and impaired night vision. If isotretinoin was prescribed for mild eruptions or anti-aging, consider seeking a second opinion.

Sources

  1. AEMPS: Ficha técnica de Isotretinoína (2024)
  2. Cochrane: Antioxidant supplements for prevention of mortality in healthy participants and patients with various diseases (2012)
How to read tiers A–F
  • AStrong evidence – first or second line in international guidelines
  • BRecommended in selected cases
  • CStudy data contradict each other
  • DBenefit not proven, no documented harm
  • FDocumented harm, or risk without benefit

Mechanism of action

Vitamin A metabolite. Reduces sebaceous gland size and activity, normalizes keratinization, has anti-inflammatory effects. Drug of choice for severe acne. Teratogen — Pregnancy Category X.

Safety

Contraindications

  • Pregnancy and lactation
  • Hypersensitivity to isotretinoin, peanut oil or soya
  • Severe hepatic impairment
  • Hypervitaminosis A
  • Severe hyperlipidaemia
  • Co-administration with tetracyclines (pseudotumor cerebri risk)

Serious adverse effects

  • Teratogenicity in pregnancy
  • Depression, suicidal ideation (requires monitoring)
  • Inflammatory bowel disease
  • Pseudotumor cerebri
  • Hypertriglyceridaemia with pancreatitis
  • Severe cutaneous reactions (Stevens-Johnson, toxic epidermal necrolysis)

Common adverse effects

  • Dry skin, lips and mucous membranes
  • Cheilitis
  • Conjunctivitis and dry eyes
  • Epistaxis
  • Myalgia and arthralgia
  • Elevated transaminases

Uncommon adverse effects

  • Depression and suicidal ideation
  • Inflammatory bowel disease
  • Pseudotumor cerebri
  • Hypertriglyceridaemia with pancreatitis
  • Severe cutaneous reactions (Stevens-Johnson, TEN)

Pregnancy: can you take Isotretinoin?

Isotretinoin is contraindicated in pregnant women and in women planning a pregnancy (AEMPS summary of product characteristics, sections 4.3 and 4.6). It causes severe fetal malformations: central nervous system defects (hydrocephalus, microcephaly, cerebellar anomalies), cleft palate, external ear and eye anomalies, heart and great-vessel defects, and thymus and parathyroid abnormalities, and it increases the risk of miscarriage. Women of childbearing potential may receive it only within the Pregnancy Prevention Programme (section 4.4): at least one highly effective contraceptive method from 1 month before treatment, throughout treatment and for 1 month after stopping, a pregnancy test shortly before the first prescription, then ideally every month and 1 month after stopping. If pregnancy occurs during treatment, isotretinoin is stopped and the patient is referred to a teratology specialist.

Breastfeeding: can you take Isotretinoin?

Not compatible. Hale L5. No human milk transfer data; highly lipophilic and accumulates in tissues. AEMPS contraindicates isotretinoin during breastfeeding.

Calculate RIDFull profile on NIH LactMed ↗

Reference information, not a clinical decision. Discuss feeding pauses or changes with your physician or an IBCLC.

Drug–drug interactions

3 pairs found. Sorted from critical to minor.

CriticalDoxycyclineTetracyclines

Mechanism

Both drugs can cause benign intracranial hypertension (pseudotumor cerebri). Some cases on isotretinoin occurred with concomitant tetracyclines (isotretinoin SmPC), and permanent vision loss has been reported with tetracyclines, including doxycycline (doxycycline SmPC). The risks add up when the drugs are combined.

Symptoms

Headache, nausea, vomiting, visual disturbances; papilloedema on fundoscopy (isotretinoin SmPC). Intracranial pressure can stay raised for weeks after the drug is stopped (doxycycline SmPC).

Management

The combination is contraindicated: the Spanish isotretinoin SmPC contraindicates isotretinoin with tetracyclines, which include doxycycline (isotretinoin SmPC). The doxycycline SmPC and the US isotretinoin label both say the combination must be avoided (doxycycline SmPC; US isotretinoin label). If an antibiotic is needed during isotretinoin treatment, tetracyclines are not chosen. If headache, nausea, vomiting, visual disturbances or papilloedema appear, stop isotretinoin at once (isotretinoin SmPC) and refer the patient to a neurologist (US isotretinoin label); visual symptoms need an urgent eye examination (doxycycline SmPC). Intracranial pressure can stay raised for weeks after stopping, so follow the patient until it stabilises (doxycycline SmPC).

Sources

Pair details →Doxycycline →

ModerateBudesonideInhaled corticosteroids (ICS)

Mechanism

Dual immunomodulation. Isotretinoin is teratogenic and affects liver function and skin barrier. Systemic budesonide suppresses immunity and raises infection risk. No direct pharmacokinetic interaction.

Symptoms

On long-term combination: increased infection susceptibility (bacterial sinusitis, pneumonia, candidiasis). Skin and mucosal dryness intensifies. Cases of intestinal mucosal ulceration on the combination have been reported.

Management

Systemic budesonide and isotretinoin are not co-prescribed without strong indication. In inflammatory bowel disease (Crohn's) with severe acne, options: treat acne topically and with adapalene, or start isotretinoin after inflammation remits and glucocorticoids are stopped. Inhaled budesonide with isotretinoin is safe.

Sources

Pair details →Budesonide →

ModerateCarbamazepineAntiepileptics. Carboxamide derivatives

Mechanism

Isotretinoin alters the absorption and clearance of carbamazepine and its active metabolite, carbamazepine-10,11-epoxide; the carbamazepine SmPC lists isotretinoin among drugs that can lower carbamazepine levels. The labels do not describe any effect of carbamazepine on isotretinoin. The second risk concerns pregnancy: carbamazepine speeds up the breakdown of hormonal contraceptives and can make them fail (carbamazepine SmPC), while isotretinoin causes severe birth defects at a high rate and is contraindicated in pregnancy (isotretinoin SmPC).

Symptoms

If carbamazepine levels fall, seizures may return. Excess carbamazepine epoxide causes dizziness, somnolence, ataxia and double vision. If hormonal contraception fails and pregnancy occurs, isotretinoin exposes the fetus to severe birth defects.

Management

The pair is not banned. When isotretinoin is started or stopped, carbamazepine blood levels are checked, as the carbamazepine SmPC requires, and the carbamazepine dose is adjusted if needed (carbamazepine SmPC). Women who can become pregnant receive isotretinoin only within the pregnancy prevention programme: effective contraception without breaks from 1 month before starting, throughout treatment and for 1 month after, with at least one highly effective user-independent method or two complementary methods; pregnancy tests before, during (ideally monthly) and 1 month after treatment (isotretinoin SmPC). Hormonal contraceptives may fail with carbamazepine, so other effective methods are chosen, for example an intrauterine device (carbamazepine SmPC).

Sources

Pair details →Carbamazepine →

Label mentions6 mentions

Verbatim lines from the interaction sections, in the language of the label

From this drug’s label

  • Criticaltetraciclinasclass named in the label
    «que reciben tratamiento simultáneo con tetraciclinas (véase sección 4.5).»

    AEMPS, section 4.3 · Open on CIMA

  • Majortetracyclinesclass named in the label
    «DRUG INTERACTIONS: Tetracyclines : Avoid concomitant use (7.2)»

    FDA, section 7 · Open on DailyMed

  • Estradiol
    «Oral Contraceptives: It is not known if there is an interaction between Isotretinoin Capsules with oral contraceptives that do not contain norethindrone and ethinyl estradiol.»

    FDA, section 7 · Open on DailyMed

  • hormonal contraceptivesclass named in the label
    «Oral Contraceptives: It is not known if there is an interaction between Isotretinoin Capsules with oral contraceptives that do not contain norethindrone and ethinyl estradiol.»

    FDA, section 7 · Open on DailyMed

From other drugs’ labels

  • MajorRetinol
    «- Medicamentos análogos a vitamina A comoretinoides, tales como isotretinoína, tretinoína, bexaroteno, acitretina, etretinato, etc. : posible aumento de riesgo de toxicidad por vitamina A; se debe…»

    AEMPS, section 4.5 · Open on CIMA

  • ModerateCarbamazepine
    «Fármacos que pueden disminuir los niveles plasmáticos de carbamazepina: Se ha informado que la isotretinoína altera la biodisponibilidad y/o el aclaramiento plasmático de la carbamazepina y de la…»

    AEMPS, section 4.5 · Open on CIMA

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Frequently asked

What is Isotretinoin used for?

Isotretinoin is evaluated for the following indications with varying evidence strength: Anti-aging and longevity (evidence tier F). See the full indication matrix with dosing and citations above on this page.

What are the side effects of Isotretinoin?

Common side effects of Isotretinoin (≥ 1 in 100): Dry skin, lips and mucous membranes, Cheilitis, Conjunctivitis and dry eyes, Epistaxis, Myalgia and arthralgia, Elevated transaminases. See the Safety section for uncommon and serious reactions.

Is Isotretinoin safe during pregnancy?

Isotretinoin is contraindicated in pregnant women and in women planning a pregnancy (AEMPS summary of product characteristics, sections 4.3 and 4.6). It causes severe fetal malformations: central nervous system defects (hydrocephalus, microcephaly, cerebellar anomalies), cleft palate, external ear and eye anomalies, heart and great-vessel defects, and thymus and parathyroid abnormalities, and it increases the risk of miscarriage. Women of childbearing potential may receive it only within the Pregnancy Prevention Programme (section 4.4): at least one highly effective contraceptive method from 1 month before treatment, throughout treatment and for 1 month after stopping, a pregnancy test shortly before the first prescription, then ideally every month and 1 month after stopping. If pregnancy occurs during treatment, isotretinoin is stopped and the patient is referred to a teratology specialist.

Is Isotretinoin compatible with breastfeeding?

Not compatible. Hale L5. No human milk transfer data; highly lipophilic and accumulates in tissues. AEMPS contraindicates isotretinoin during breastfeeding.

Who should not take Isotretinoin?

Isotretinoin is contraindicated in: Pregnancy and lactation; Hypersensitivity to isotretinoin, peanut oil or soya; Severe hepatic impairment; Hypervitaminosis A; Severe hyperlipidaemia. Full list in the Safety section.

Official sources

Direct links to regulator labels. Open in a new tab.

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