 [ Symptoms ] i have a sinus infection poison ivy and no insurance a friend gave me a sulfamethtmp ds prescription will this help [ Disease ] you never want to take someone else is medication this is risky and not safe antibiotics do not help with poison ivy i would recommend calling your local hospitals to see if they have a clinic or try visiting the in store clinics that are in some drugstores you can try products like zanafel ivy dry and tecnu that can help with drying up the oils causing the itching