Is Coal Tar 1% shampoo safe to use after a hair transplant?

50 days post hair transplant: for the last 3 years I have been suffering from the seborrheic dermatitis due to that at the donor area and some transplanted area whitish crusting and when I removed it, it came again and again. I've used Fluconazole, Itraconazole and many antifungal and antidandruff shampoos for the same but it continues on a particular area over the scalp. My doctor has given me a coal tar 1%shampoo, is it safe to use after a transplant?