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Retinoids

»What are retinoids?
»How do vitamin A and retinoids exert their effect at a molecular level?
»Which retinoids are prescribed for the treatment of skin diseases?
»Are there any retinoids found in topical over-the-counter (OTC) products?
»What are the clinical indications for using topical tretinoin?
»What is the mechanism of action of tretinoin in acne vulgaris?
»How should topical tretinoin be used to treat acne vulgaris?
»After starting topical tretinoin for acne vulgaris, the patient reports that her acne is worse. Should she immediately discontinue the drug?
»Is topical tretinoin cream really useful in treating photoinduced wrinkles?
»Is there clinical evidence that topical retinoids improve melasma?
»What are the side effects of topical tretinoin?
»Is topical tretinoin safe to use during pregnancy or when nursing?
»What are the clinical indications for tazarotene?
»What are the clinical indications for alitretinoin?
»Do retinoids have any role in the treatment or prevention of cancer?
»What are the clinical indications for oral isotretinoin?
»What is the mechanism of action of oral isotretinoin in acne vulgaris?
»Are there any contraindications to the use of oral isotretinoin?
»How is oral isotretinoin administered for the treatment of acne vulgaris?
»What are the side effects of oral retinoid therapy?
»Are there any strategies or treatments that reduce the dry skin and lips associated with retinoid therapy?
»Are the clinical indications for acitretin the same as for isotretinoin?
»What is the mechanism of action of acitretin?
»How is acitretin administered for the treatment of psoriasis?
»What are the contraindications for using oral acitretin?

 
 
 

Are there any contraindications to the use of oral isotretinoin?

Isotretinoin is classified as a pregnancy category X drug, which means that it is absolutely contraindicated for patients who are pregnant. Between 1982 and 1989, the manufacturer received 151 reports of patients who carried their fetuses to term. In 47% there were significant congenital malformations, with most being cardiovascular, craniofacial, or central nervous system in nature.

In 2002, an intensive program (System to Manage Accutane-Related Teratogenicity, or SMART) consisting of counseling, consent forms, videotapes, written information, utilization of two forms of effective contraception, and two negative urine or serum pregnancy tests (to include one within the first 5 days of the menstrual period before implementing therapy) was undertaken. The program was not successful in preventing pregnancies while on therapy. In 2006, the FDA has implemented a very controlled restrictive program called iPledge to reduce the access of this drug. In this new program, both doctors and pharmacists are required to register and use a website to prescribe this drug. This new program is so restrictive that it is actually easier to buy a firearm in most states than it is to prescribe oral isotretinoin.

Patients who become pregnant while taking the drug should consider the desirability of continuing the pregnancy. Health care providers who are not knowledgeable about the proper way to administer and monitor oral retinoids should never use this class of drugs. Relative contraindications for oral retinoid therapy include patients with pseudotumor cerebri, inflammatory bowel disease, hyperlipidemia, hepatitis, and those who are children.