Zinderm BN Gel is the combination medicine used in the treatment of acne. It reduces the oil production in the skin and helps to keep your pores open. It also kills the microorganisms that cause acne. Zinderm BN Gel is for external use only. You should use it as advised by your doctor. The leaflet that comes with the product will also give instructions which you should read to get the most out of this medicine. You should normally wash and dry the affected area before applying a thin layer of gel once or twice a day. You should not apply it to damaged or broken skin and avoid contact with your mouth, eyes, and nose. It may take several weeks for your symptoms to improve and several months to get maximum benefit, consult your doctor after a month of regular use of this medicine if your condition is not improving.It has some common side effects including itching, stinging, peeling and redness of the skin. They are not usually serious but, if they bother you or do not go away, tell your doctor. You may need to apply smaller amounts or use it less often. This medicine can make you more sensitive to sunlight. While using it you should try to avoid exposure to too much sunlight.It is not likely that other medicines you take by mouth or injection will affect the way this medicine works, but talk to your doctor before using it if you have recently used another medicine for the infection. The medicine is not recommended for pregnant women. Pregnant and breastfeeding mothers should consult their doctors before using this medicine.