Isotretinoin is used to treat severe recalcitrant nodular acne (a certain type of severe acne) that has not been helped by other treatments, such as antibiotics. Isotretinoin is in a class of medications called retinoids. It works by slowing the production of certain natural substances that can cause acne.
How should this medicine be used?
Isotretinoin comes as a capsule to take by mouth. Isotretinoin is usually taken twice a day with meals for 4 to 5 months at a time. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take isotretinoin exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.
Swallow the capsules whole with a full glass of liquid. Do not chew or suck on the capsules.
Your doctor will probably start you on an average dose of isotretinoin and increase or decrease your dose depending on how well you respond to the medication and the side effects you experience. Follow these directions carefully and ask your doctor or pharmacist if you are not sure how much isotretinoin you should take.
It may take several weeks or longer for you to feel the full benefit of isotretinoin. Your acne may get worse during the beginning of your treatment with isotretinoin. This is normal and does not mean that the medication is not working. Your acne may continue to improve even after you finish your treatment with isotretinoin.
Other uses for this medicine
Isotretinoin has been used to treat certain other skin conditions and some types of cancer. Talk to your doctor about the possible risks of using this medication for your condition.
This medication may be prescribed for other uses. Ask your doctor or pharmacist for more information.
What special precautions should I follow?
Before taking isotretinoin,
- tell your doctor and pharmacist if you are allergic to isotretinoin, vitamin A, any other medications, or any of the ingredients in isotretinoin capsules. Ask your pharmacist or check the Medication Guide for a list of the inactive ingredients.
- tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, herbal products, and nutritional supplements you are taking or plan to take. Be sure to mention medications for seizures such as phenytoin (Dilantin); medications for mental illness; oral steroids such as dexamethasone (Decadron, Dexone), methylprednisolone (Medrol), and prednisone (Deltasone); tetracycline antibiotics such as demeclocycline (Declomycin), doxycycline (Monodox, Vibramycin, others), minocycline (Minocin, Vectrin), oxytetracycline (Terramycin), and tetracycline (Sumycin, Tetrex, others); and vitamin A supplements. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
- tell your doctor if you or anyone in your family has thought about or attempted suicide and if you or anyone in your family has or has ever had depression, mental illness, diabetes, asthma, osteoporosis (a condition in which the bones are fragile and break easily), osteomalacia (weak bones due to a lack of vitamin D or difficulty absorbing this vitamin), or other conditions that cause weak bones, a high triglyceride (fats in the blood) level, a lipid metabolism disorder (any condition that makes it difficult for your body to process fats), anorexia nervosa (an eating disorder in which very little is eaten), or heart or liver disease. Also tell your doctor if you are overweight or if you drink or have ever drunk large amounts of alcohol.
- do not breast-feed while you are taking isotretinoin and for 1 month after you stop taking isotretinoin.
- plan to avoid unnecessary or prolonged exposure to sunlight and to wear protective clothing, sunglasses, and sunscreen. Isotretinoin may make your skin sensitive to sunlight.
- you should know that isotretinoin may cause changes in your thoughts, behavior, or mental health. Some patients who took isotretinoin have developed depression or psychosis (loss of contact with reality), have become violent, have thought about killing or hurting themselves, and have tried or succeeded in doing so. You or your family should call your doctor right away if you experience any of the following symptoms: anxiety,sadness, crying spells, loss of interest in activities you used to enjoy, poor performance at school or work, sleeping more than usual, difficulty falling asleep or staying asleep, irritability, anger, aggression, changes in appetite or weight, difficulty concentrating, withdrawing from friends or family, lack of energy, feelings of worthlessness or guilt, thinking about killing or hurting yourself, acting on dangerous thoughts, or hallucinations (seeing or hearing things that do not exist). Be sure that your family members know which symptoms are serious so that they can call the doctor if you are unable to seek treatment on your own.
- you should know that isotretinoin may cause your eyes to feel dry and make wearing contact lenses uncomfortable during and after your treatment.
- you should know that isotretinoin may limit your ability to see in the dark. This problem may begin suddenly at any time during your treatment and may continue after your treatment is stopped. Be very careful when you drive or operate machinery at night.
- plan to avoid hair removal by waxing, laser skin treatments, and dermabrasion (surgical smoothing of the skin) while you are taking isotretinoin and for 6 months after your treatment. Isotretinoin increases the risk that you will develop scars from these treatments. Ask your doctor when you can safely undergo these treatments.
- talk to your doctor before you participate in hard physical activity such as sports. Isotretinoin may cause the bones to weaken or thicken abnormally and may increase the risk of certain bone injuries in people who perform some types of physical activity. If you break a bone during your treatment, be sure to tell all your healthcare providers that you are taking isotretinoin.
What special dietary instructions should I follow?
Unless your doctor tells you otherwise, continue your normal diet.
What should I do if I forget a dose?
Skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.
What side effects can this medication cause?
Isotretinoin may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
- red, cracked, and sore lips
- dry skin, eyes, mouth, or nose
- changes in skin color
- peeling skin on the palms of the hands and soles of the feet
- changes in the nails
- slowed healing of cuts or sores
- bleeding or swollen gums
- hair loss or unwanted hair growth
- voice changes
- cold symptoms
Some side effects can be serious. If you experience any of the following symptoms or those listed in the IMPORTANT WARNING or SPECIAL PRECAUTIONS sections, stop taking isotretinoin and call your doctor or get emergency medical treatment immediately:
- blurred vision
- slow or difficult speech
- weakness or numbness of one part or side of the body
- stomach pain
- chest pain
- difficulty swallowing or pain when swallowing
- new or worsening heartburn
- rectal bleeding
- yellowing of the skin or eyes
- dark colored urine
- back, bone, joint or muscle pain
- muscle weakness
- difficulty hearing
- ringing in the ears
- vision problems
- painful or constant dryness of the eyes
- unusual thirst
- frequent urination
- trouble breathing
- fast or pounding heartbeat
- red, swollen, itchy, or teary eyes
- peeling or blistering skin, especially on the legs, arms, or face
- sores in the mouth, throat, nose, or eyes
- red patches or bruises on the legs
- swelling of the eyes, face, lips, tongue, throat, arms, hands, feet, ankles, or lower legs
- difficulty swallowing or pain when swallowing
Isotretinoin may cause the bones to stop growing too soon in teenagers. Talk to your child’s doctor about the risks of giving this medication to your child.
Isotretinoin may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.
If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration’s (FDA) MedWatch Adverse Event Reporting program