Goeckerman therapy is a regimen for treatment of moderate to severe plaque psoriasis using a combination of crude coal tar and artificial ultraviolet radiation. It is a specialized form of light therapy.
First formulated in 1925 by American dermatologist William H. Goeckerman (1884–1954), Goeckerman therapy continues to be used due to its efficacy and safety profile.[1] Individual institutions have modified the Goeckerman regimen and developed their own protocols. Standard therapy includes use of 2–4% crude coal tar in a petroleum base applied daily to the psoriatic plaques. The minimum period of time for tar application is 2-hours, although it has been recognized that greater periods of time produce better results.[2] The patient is then exposed to broad-band ultraviolet B (UVB) radiation, although narrow-band UVB may also be used.[3] Laboratory studies have shown that the combination of coal tar and UV light reduces epidermal DNA synthesis.[4]