Isotretinoin

Isotretinoin is a strong oral medicine derived from vitamin A, used to treat severe nodular acne when other treatments have not worked. This guide covers isotretinoin uses, how it works, dosage, side effects, precautions, drug interactions, use in pregnancy and breastfeeding and its approximate price in India.

At a Glance

What is Isotretinoin?

Isotretinoin is a powerful oral medicine derived from vitamin A. It is used to treat severe nodular acne when other treatments, such as topical medicines and antibiotics, have not worked. Because of serious risks, it is reserved for severe acne and must be prescribed and monitored by a doctor, usually a dermatologist. It is not for mild or moderate acne.

How Isotretinoin Works

Isotretinoin shrinks the oil glands in the skin and reduces their oil (sebum) production. It also affects how skin cells build up inside pores, which helps stop pores from clogging, and it reduces inflammation. These effects are thought to underlie its action on acne, although the exact mechanism is not fully understood. Many people have a long-lasting improvement after a single course, and improvement can continue for some time after treatment ends.

When Isotretinoin Is Used

• Severe recalcitrant nodular acne: The US label covers patients 12 years and older with multiple inflammatory nodules 5 mm or larger who are not pregnant, and reserves isotretinoin for those who have not responded to conventional therapy, including systemic antibiotics.
• Acne at risk of scarring: Severe acne can leave permanent scars. Controlling severe acne can reduce the risk of new scarring, but isotretinoin does not remove existing scars.
• Other uses exist in specialist practice, but they are doctor-directed and not covered in this article.

Isotretinoin Dosage and How to Take It

The dose depends on your body weight, your response and side effects, and the product. The examples below are from US prescribing information and are general information only. Your dermatologist decides your dose.

• Adults: The recommended dosage is 0.5 to 1 mg/kg/day, given in two divided doses, for 15 to 20 weeks. Adults with very severe disease (scarring or acne mainly on the trunk) may need up to 2 mg/kg/day, as tolerated.
• Children and teenagers: The US label covers patients 12 years and older. Safety and effectiveness below 12 years have not been established. Young people need careful monitoring, since back pain, joint pain and effects on bone growth have been reported.
• Cumulative dose: Some dermatologists also consider the cumulative dose over the course of treatment, but the target is individualized based on response, side effects and clinical judgment. It is a different measure from the daily dose and is not a daily maximum.
• Taking it: Take it exactly as prescribed, swallowing capsules whole with water. Food instructions vary by isotretinoin formulation. Follow the instructions for your specific product.
• Missed dose: If you miss a dose, skip it and take your next dose at the regular time. Do not take two doses at the same time.
• Treatment length: If the number of nodules falls by more than 70% before the course ends, the drug may be stopped. Long-term use, even at low doses, has not been studied and is not recommended.
• Repeat courses: After at least 2 months off treatment, a second course may be considered if severe acne persists or returns. Acne can keep improving for some time after a course ends, which is why a gap is advised. For the US-labeled isotretinoin capsules, a second course may be initiated in patients who have completed skeletal growth, and the optimal interval before retreatment has not been defined for patients who have not completed skeletal growth. Your dermatologist will decide whether and when retreatment is appropriate. Not everyone needs a second course.

Take this medicine only as advised by your doctor. Do not start, stop, or change the dose on your own.

Side Effects of Isotretinoin

Common effects include:

• Dry skin, dry or cracked lips, and dry mouth
• Dry eyes and difficulty wearing contact lenses
• Nosebleeds from a dry nose
• Joint and muscle aches, and back pain
• Temporary thinning of hair
• Sensitivity to sunlight
• Raised blood triglycerides and cholesterol, and raised liver enzymes (found on blood tests)

Serious effects need prompt medical attention:

• Birth defects: isotretinoin can cause severe birth defects and miscarriage if taken during pregnancy.
• Mood and mental health changes: depression, anxiety, aggression, psychosis, and thoughts of harming yourself. Contact your doctor immediately if you notice significant mood or mental-health changes, and seek urgent help for thoughts of self-harm. Your doctor will advise whether treatment should be stopped. Family members should watch for changes too.
• Raised pressure in the skull (pseudotumor cerebri): severe headache, blurred vision, nausea and vomiting. This risk is higher with tetracycline antibiotics.
• Pancreatitis, especially with very high triglycerides: severe stomach pain
• Liver problems: yellowing of the skin or eyes, dark urine
• Inflammatory bowel disease: severe diarrhea, rectal bleeding or abdominal pain
• Vision and hearing problems: reduced night vision, corneal changes, or hearing loss or ringing in the ears
• Bone changes: bone and joint problems, including effects on bone growth in young people
• Severe skin and allergic reactions: widespread rash, blistering or swelling of the face

Isotretinoin Precautions and Monitoring

• Pregnancy prevention is essential. See the Pregnancy and Breastfeeding section.
• Blood tests: Doctors usually check blood fats (cholesterol and triglycerides) and liver function before treatment and during it, and may check blood sugar. The schedule depends on your doctor.
• Mental health: Tell your doctor about any history of depression or other mental health conditions before starting.
• Blood donation: Do not donate blood during treatment and for at least 1 month afterwards.
• Cosmetic skin procedures: Avoid waxing, dermabrasion, laser treatments and similar procedures during treatment and for at least 6 months after stopping, because of the risk of scarring and poor healing.
• Sun, skin and eyes: Use sunscreen and protective clothing, moisturize, and use lip balm. See an eye doctor if vision changes. Take care with night driving if night vision is affected.
• Alcohol: Alcohol can raise triglycerides and the risk of liver problems, so discuss it with your doctor.
• Vitamin A: Do not take vitamin A supplements or multivitamins containing vitamin A unless your doctor says so.

Isotretinoin Drug Interactions

• Tetracycline antibiotics (such as doxycycline and minocycline): increase the risk of raised pressure in the skull (pseudotumor cerebri). Avoid combining them unless your doctor decides it is appropriate.
• Vitamin A supplements: can add to vitamin A toxicity and should be avoided.
• Hormonal contraceptives: Progestin-only birth control pills (“minipills”) are not considered adequate pregnancy prevention during treatment. St. John’s Wort may reduce the effectiveness of hormonal contraception, so avoid it.
• Alcohol: may raise blood triglycerides and the risk of liver problems.

Tell your doctor and pharmacist about all prescription medicines, over-the-counter medicines and supplements you take. This list is not complete.

Isotretinoin in Pregnancy and Breastfeeding

Isotretinoin must not be used during pregnancy. It can cause severe birth defects and miscarriage, so pregnancy must be avoided during treatment and for at least 1 month after the last dose. People who can become pregnant need pregnancy testing and pregnancy-prevention measures according to the requirements of their country. If you think you may be pregnant, contact your doctor immediately.

India

iPLEDGE is a US program and does not apply in India. Follow your dermatologist’s pregnancy-prevention instructions and any applicable local requirements, strictly.

Stop taking isotretinoin and contact your doctor immediately if you miss a period, think you might be pregnant, or have unprotected sex. Do not breastfeed during treatment or for 1 month after stopping, and ask your doctor when it is safe to breastfeed again.

Isotretinoin Brands, Strengths and Approximate Price in India

Examples of isotretinoin brands marketed in India include Tretiva (Intas), Isotroin (Cipla), Sotret (Sun Pharma) and Acutret (Ipca), based on pharmacy listings. This is not an exhaustive list, and availability can change. Listings show 5 mg, 10 mg, 20 mg and 30 mg capsules, depending on the brand. Brands differ in pack size, so compare carefully.

Approximate price in India (20 mg, strip of 10 capsules): about ₹248–₹358 across Tretiva, Acutret and Sotret, based on online pharmacy listings.

These are listing-based figures, not guaranteed current MRPs, and some brands showed different values in different listings. Prices vary by brand, strength, pack size, pharmacy, location and date, and availability can change.

How HealthPil Can Help

Medicines should be started, adjusted, or stopped only under the guidance of a qualified healthcare professional. If you have questions about isotretinoin or acne treatment, you can consult a doctor through HealthPil, including dermatologists who specialize in acne and can guide you through safe treatment, monitoring and side effect management.