66 citations,
January 1987 in “Journal of Investigative Dermatology” Coal tar shampoo increases enzyme activity in hair follicles, enhancing carcinogen binding to DNA.
16 citations,
January 2000 in “Journal of dermatological treatment” Calcipotriol scalp solution works better than coal tar shampoo for treating scalp psoriasis and is safe for long-term use.
128 citations,
January 2001 in “American Journal of Clinical Dermatology” Coal tar shampoos, salicylic acid, and topical corticosteroids are effective for scalp psoriasis, with Vitamin D3 analogues also showing benefits; severe cases may require stronger medication with more risks.
December 2004 in “Microbial Ecology in Health and Disease” Pityriasis amiantacea is linked to Staphylococcus aureus infection and can be effectively treated with antibiotics, corticosteroids, and coal tar.
159 citations,
March 2014 in “Journal of The American Academy of Dermatology” Some skin medications are safe during pregnancy and breastfeeding, but others can harm the baby and should be avoided.