Lichen Planus Like Lesions Caused by Thiacetazone.

Thiacetazone has been used as a standard antituberculous drug in several countries. Side effect& which include various VM of skin eruptions have been observed in about 10% of patients taking thiacetazone. We are reporting two' cases of lichen planus-like lesions presumably due to thiacetazone. Of these, one case had preexisting lichen planus hypertrophicus but the other one, did not have any past history of lichen planus.