1940’S
Antibiotics and Vitamin B-complex
1950’s
Corticosteroids (topical application of hydrocortisone)
1970’s
Vitamin A analogs (retinols, retinoic acid)
1980’s
Vitamin D analogs
1980’s-1990’s
Lasers and phototherapy
1990’s-2000’s
Biologics1 to treat auto immune diseases