Very rarely, even acetaminophen may make asthma worse. If this happens to you, tell your doctor. Antihistamines are safe for people with asthma to use, but they can cause side effects. Some antihistamines can't be taken with certain other medicines. Before you start taking any new medicine, make sure your doctor or pharmacist knows which antihistamine you are taking.
Beta blockers are drugs used to control blood pressure and heart disease.
Sometimes they are given to people who have anxiety or headaches. All of the drugs in this group can make asthma worse. If you have started taking a beta blocker and your asthma gets worse, tell your doctor. ACE inhibitors are another type of medicine given to treat blood pressure, heart disease and, sometimes, diabetes. These medicines appear to be safe for people with asthma.