Isotretinoin belongs to a class of medications called retinoids (a type of Vitamin A), which works by stopping the formation of pimples on the skin. It is used to treat severe forms of acne which are resistant to treatments with antibiotics or topical therapy.
Isotretinoin is available as a capsule. It should be taken with food or immediately after a meal. Swallow it whole with a glass of water and do not crush, chew, or break the tablet. The dosage is calculated from your body weight in kilograms (kg).
Initially 0.5 mg/kg daily in single or two divided doses, which may increase to 1 mg/kg daily if necessary. The usual treatment duration is 16-24 weeks. If relapse after the first course, repeat the treatment course after at least 8 weeks.
Common side effects of Isotretinoin include dry skin, muscle/joint/back pain, and eyesight problems, such as blurred vision, eye pain or redness, dry eyes, discomfort when wearing contact lenses and decreased night vision.
Common dosing schedule:
Isotretinoin is taken once or twice a day. Take Isotretinoin at mealtime.
This schedule is for reference only, adjustments may be made according to individual needs.
Some common medications Isotretinoin may interact with:
Please notify your doctor or pharmacist if you are taking the above medication, dosage adjustments might be needed.
In Hong Kong, Isotretinoin is a prescription only medicine, and requires a prescription from a doctor to be purchased in a pharmacy. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.
For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at https://www.drugoffice.gov.hk
Need more information?
For detailed information about the use of Isotretinoin in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.
Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.
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