<unk>  is a dermatologic agent that is FDA approved for the treatment of severe recalcitrant nodular acne in patients 12 years of age and older. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include lip dry, dry skin, back pain, dry eye, arthralgia, epistaxis, headache, nasopharyngitis, chapped lips, dermatitis, blood creatine kinase increased, cheilitis, musculoskeletal discomfort, upper respiratory tract infection, visual acuity reduced.
Isotretinoin
Alitretinoin
Tretinoin 
Halobetasol
Clobetasol
Clobetasol propionate
Etretinate
Psoralen