When using salicylic acid and sulfur combination drug, do not use any of the following preparations on the same effected area as this drug , unless otherwise directed by your family doctor:
To use any of the above preparations on the same effected area as salicylic acid and sulfur combination drug may cause severe irritation of the skin.
Do not use any topical mercury-containing preparation, such as ammoniated mercury ointment, on the same effected area as this drug . To do so may cause a foul odor, may be irritating to the skin and may stain the skin black. If you have any questions about this, check with your health care professional.
Taking large doses of aspirin or other salicylates - including diflunisal while using topical salicylic acid - contained in this drug may lead to overdose. If you have any questions about this, check with your health care professional.