Isotretinoin is a highly effective treatment for acne and generally is well tolerated, however it does have the potential for side effects and it is important that you are aware of these when deciding whether it is the right treatment for you.

In October 2023 the Medicines & Healthcare products Regulatory Agency (MHRA) introduced significant new regulations governing the prescription of isotretinoin. This has important implications for patients with mental health issues and for patients with the potential to become pregnant. These rules apply to all doctors prescribing isotretinoin and may mean that you need to attend for more appointments than previously or that you need to have a mental health assessment prior to starting treatment.

Isotretinoin, also known as Roaccutane or Accutane, is an oral retinoid. It is one of the most effective treatment for acne with approximately 85-90% of patients seeing a long term improvement in the skin after completing a course of treatment. Despite the potential side effects listed below, in my experience, the vast majority of patients tolerate treatment well.

Isotretinoin is taken as a course of treatment with the total amount required to complete the course determined by your body weight. The average duration of treatment is typically 6-9 months. You will start with a relatively low dose since there can be a temporary flare in your acne at the beginning of treatment and to allow you to get used to any side effects. After the first month or so the dose is typically increased.

Common side effects

Common side effects include dryness of the skin, eyes and lips; nosebleeds; sun-sensitivity; muscle and joint aches; impaired night vision and increased fats in the blood (hyperlipidamia). Rarer side effects include inflammation of the liver (hepatitis) or pancreas (pancreatitis); raised pressure within the brain; sexual side effects (which rarely can persist after stopping treatment); inflammatory bowel disease and a flare of acne resulting in scarring. Isotretinoin can cause mood disturbance and depression and has rarely been associated with suicide and it is essential to stop taking the medication and contact a doctor urgently if low mood arises.

The British association of Dermatologists has produced a very helpful Patient Information Leaflet that lists some additional rare side effects that may occur and provides additional information relating to treatment with isotretinoin and it is very important that you have read this and discussed any questions before starting the medication. As for any medication it is also essential to read the information that comes within the packaging and contains a full list of all recognised side effects.

Mental health assessment

All patients must complete the following screening questionnaires for mental health conditions:

If you have previously suffered from anxiety/depression or if the screening tools above identify evidence of depression or anxiety then it is important that you are assessed by a psychiatrist before starting Isotretion to determine whether it is safe for you to take this medication.

Pregnancy prevention program

Isotretinoin causes serious birth defects and it is critical not to take the medicine if pregnant or breast feeding or for at least a month after. The MHRA mandates that patients with child bearing potential are enrolled in a pregnancy prevention program. Previously patients were allowed to take responsibility for not becoming pregnant and opt out of this program however this is now no longer permitted.

The MHRA states the following: "A person has childbearing potential if they have a uterus and at least one ovary unless they: (a) Have undergone surgical sterilisation (tubal ligation), confirmed by a healthcare professional. (b) Are post-menopausal, confirmed by a healthcare professional."

For patients with child bearing potential the MHRA has defined 3 groups of patients and this determines how often you need to attend for follow up:-

  • Group A - I confirm I do not require contraception because there is no risk of pregnancy during treatment and for 1 month after treatment. I do not require pregnancy testing. I will let my prescriber know if my situation changes. Initial prescription will be for 4 weeks, subsequent prescriptions can be for up to 12 weeks.
  • Group B - I confirm I have been using the contraceptive implant or have had a coil (IUD) or intra-uterine system (IUS) for at least 4 weeks. I agree to pregnancy testing at follow-up appointments. I may choose to do monthly pregnancy tests at home because no contraception is 100% effective. I will let my prescriber know if my situation changes.¬†Initial prescription will be for 4 weeks, subsequent prescriptions can be for up to 12 weeks. ¬†
  • Group C - I confirm I have been using a hormonal contraceptive pill or contraceptive injection plus I agree to use a barrier method (i.e. a condom, female condom, vaginal cap). I agree to pregnancy testing every 30 days during treatment. My prescriptions will be for 30 days. Prescriptions will need to be collected within 7 days.

Females in Group C will need to attend every 4 weeks for a pregnancy test before a prescription can be issued.

Follow up appointments

All patients (male or female) will need to attend for a follow up appointment after the first month. Males and females with no reproductive potential or falling into MHRA Groups A and B can then attend every 12 weeks. Females falling into group C will need to attend every 4 weeks.


There is now very strict regulation governing the prescribing of Isotretinoin and if you would like me to prescribe then the following steps will need to be completed. These can be completed during your initial consultation:-

  1. Attend for a consultation so that I can assess your skin and discuss treatment options.
  2. Read the British Association of Dermatologist's Patient information leaflet
  3. Complete the PHQ-9 and GAD-2 screening tools for depression and anxiety and if there is evidence of these conditions then attend for a consultation with a psychiatrist prior to starting treatment.
  4. If you have child bearing potential, inform me if you are in Group A, B or C with regards to the pregnancy prevention program (see above).
  5. Read and sign the MHRA Isotretion Consent Form.
  6. Attend for baseline blood tests: Full blood count (FBC), urea and elecrolytes (U&E), liver function (LFT) and cholesterol and triglycerides (Lipids).
  7. If you are female you will need to perform a pregnancy test on the day that the medication is prescribed.

Useful links

Common Questions

 What skincare routine should I use during isotretinoin treatment?
 How effective is isotretinoin?
 Can I have laser treatments whilst taking isotretinoin?

Book Consultation

To book an in person consultation, enter your details below and my practice management team will contact you to schedule the appointment. Alternatively call 0203 389 6076 (calls are answered during working hours) or email:

Back to home