Isotretinoin and Gestodene: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 11, 2026 · Source data updated Jul 2, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Isotretinoin
Gestodene
No brand names on record
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
This is a really important one. Isotretinoin (Accutane and similar acne pills) can cause severe birth defects, so avoiding pregnancy during treatment is critical. Gestodene is a progestin used in some hormonal birth control. The concern here is that isotretinoin may make hormonal birth control work less reliably, and the changes are small but unpredictable from person to person.
There have been pregnancies reported even in women using birth control, especially when relying on just one method. The good news is your care team has a clear, safe plan for this. If you take isotretinoin, please talk with your doctor or pharmacist about using two forms of contraception at the same time.
Effect: Theoretical reduction in hormonal contraceptive efficacy when gestodene-containing contraception is used with isotretinoin.
- Mechanism: Unknown. PK/PD changes to estrogens and progestins are described as small but highly variable and unpredictable. Neither agent is a prodrug in a way that reverses this direction.
- Evidence: Theoretical; supported by post-marketing pregnancy reports, more frequent with single-method contraception.
- Onset: Unspecified.
- Management: Require two simultaneous forms of contraception (unless absolute abstinence or hysterectomy). Progestin-only micro-dosed preparations may be inadequate. Enforce iPLEDGE-style counseling and monthly pregnancy testing per program requirements.
What happens
Decreased effectiveness of hormonal contraceptives
Interaction Deep Dive
The pharmacokinetic and pharmacodynamic effects of isotretinoin on estrogens and progestins, when the two are given together, tend to be minor yet markedly variable and difficult to anticipate. Pregnancies have been documented among women relying on combined oral contraceptives, and also among those using topical, injectable, implantable, or insertable hormonal birth control products. These reports have been more common in individuals depending on a single contraceptive method. Progestin-only pills that are micro-dosed increase the likelihood of contraceptive failure when taken alongside isotretinoin. Throughout isotretinoin treatment, female patients capable of becoming pregnant are required to employ 2 contraceptive methods at the same time, with one of them being: tubal ligation, a partner's vasectomy, intrauterine devices, birth control pills, or topical/injectable/implantable/insertable hormonal birth control products123.
Why it happens (mechanism)
Unknown
How to manage this interaction
The key point is that one method of birth control may not be enough during isotretinoin therapy because its reliability can drop unpredictably.
- Use two forms of contraception at the same time, unless you and your prescriber have agreed on absolute abstinence or you have had a hysterectomy.
- One form should be a primary method such as birth control pills, an IUD, an implant/injection, tubal ligation, or a partner's vasectomy.
- Be aware that progestin-only minipills (no estrogen) may not be adequate on their own.
- Keep taking your medications as prescribed and ask your prescriber or pharmacist to confirm your contraception plan before and during treatment.
Management is individual — confirm any change with your pharmacist or prescriber.
Literature reports
2 reports — tap to read
a) In one study, isotretinoin showed no interaction with oral contraceptives. Nine women receiving isotretinoin 0.5 mg/kg for severe pustular acne had been taking oral contraceptives (brand unknown) for at least three months before beginning isotretinoin therapy. As measured by radioimmunoassay, plasma concentrations of ethinyl estradiol and levonorgestrel were comparable in the control cycle and in two cycles following the start of isotretinoin 4.
b) When isotretinoin was administered together with a combination ethinyl estradiol/norethindrone product, the pharmacokinetic and pharmacodynamic changes were inconsistent and relatively minor. In a single-center, open-label drug interaction study, 26 healthy women completed a protocol in which they took ethinyl estradiol/norethindrone oral contraceptive (OC) triphasic tablets (35 micrograms and 0.5/0.75/1 milligrams, respectively) each day. Beginning at the start of the third month, and after pregnancy had been excluded, participants additionally received isotretinoin 1 milligrams/kilogram/day in two divided doses to complete 16 to 20 weeks of isotretinoin treatment for severe, recalcitrant nodular acne. Plasma concentrations of ethinyl estradiol and norethindrone were slightly lower (9% and 11%, respectively) during the OC plus isotretinoin phase relative to the OC alone phase; however, patient variability was high. Follicle stimulating hormone concentration fell 44% (p=0.03) with the addition of isotretinoin, again with substantial variability; serum progesterone and luteinizing hormone levels were unchanged. No pregnancies were reported 5.
Common questions
Can I take Isotretinoin and Gestodene together?
Isotretinoin can make hormonal birth control less reliable in an unpredictable way, so pregnancy prevention needs two simultaneous methods during treatment. Confirm your contraception plan with your prescriber or pharmacist before continuing. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Isotretinoin and Gestodene interaction?
It is rated major. Potentially serious — often needs a change or close monitoring.
How quickly could this interaction happen?
The documented onset is "unspecified". The timing of this interaction is not well characterized.
How is the Isotretinoin and Gestodene interaction managed?
The key point is that one method of birth control may not be enough during isotretinoin therapy because its reliability can drop unpredictably. Use two forms of contraception at the same time, unless you and your prescriber have agreed on absolute abstinence or you have had a hysterectomy. One form should be a primary method such as birth control pills, an IUD, an implant/injection, tubal ligation… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
Questions for your pharmacist
- Does my dose of Isotretinoin or Gestodene need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there a safer alternative to one of these medications for me?
References (5)
- Product Information: Amnesteem(R) oral capsules, isotretinoin oral capsules. Mylan Pharmaceuticals Inc, Morgantown, WV, 2010. DailyMed
- Product Information: Claravis(TM) oral capsules, isotretinoin oral capsules. Barr Laboratories, Inc, Pomona, NY, 2010. DailyMed
- Product Information: Sotret(R) oral capsules, isotretinoin oral capsules. Ranbaxy Laboratories Inc. Jacksonville, FL, 2010. DailyMed
- Orme M, Back DJ, & Shaw MA: Isotretinoin and contraception. Lancet 1984; 2:752-753. PubMed
- Hendrix CW, Jackson KA, Whitmore E, et al: The effect of isotretinoin on the pharmacokinetics and pharmacodynamics of ethinyl estradiol and norethindrone. Clin Pharmacol Ther 2004; 75:464-75. PubMed
Keep reading about Isotretinoin
Keep reading about Gestodene
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