RT Book, Section A1 Vahlquist, Anders A1 Saurat, Jean-Hilaire A2 Goldsmith, Lowell A. A2 Katz, Stephen I. A2 Gilchrest, Barbara A. A2 Paller, Amy S. A2 Leffell, David J. A2 Wolff, Klaus SR Print(0) ID 56099966 T1 Chapter 228. Retinoids T2 Fitzpatrick's Dermatology in General Medicine, 8e YR 2012 FD 2012 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-166904-7 LK accessmedicine.mhmedical.com/content.aspx?aid=56099966 RD 2024/04/23 AB |PrintRetinoids at a GlanceThe biologic functions and actions of retinoids (excluding vision) include: Reproduction, embryonic growth, and morphogenesis.Modulation of proliferation and differentiation of epithelia.Decrease in sebaceous gland size (isotretinoin).Immunologic and anti-inflammatory effects.Tumor prevention and treatment.Effect on extracellular matrix components.Four types of oral retinoids and the major indications for their use are isotretinoin (acne), alitretinoin (chronic hand eczema), acitretin/etretinate (psoriasis, keratinizing disorders), and bexarotene (cutaneous T-cell lymphoma). Contraindications to their use include pregnancy, breastfeeding, and nonadherence to contraceptive regimen. Retinoids should always be taken with food or milk to enhance intestinal absorption. Dosing once a day is usually sufficient.Mucocutaneous side effects (cheilitis, xerosis, skin peeling, conjunctivitis) are common, as are reversible abnormal results on laboratory tests [hyperlipidemia, increased liver enzyme levels, and hypothyroidism (bexarotene)]. Musculoskeletal and central nervous system side effects are rare.