Your immune system reacts to harmful foreign substances to eliminate them from the body.Sometimes, your immune system may react to bee venom, pollen, pet dander, or another foreign substance that usually does not cause any reaction in most people.
Other blood tests and procedures may be necessary, depending on what the doctor learns from interviewing and examining you.
They may react with antifungal medicines and antidepressants.
Also, avoid alcohol when you are taking antihistamine because it can make your drowsiness worse.
First generation antihistamines can have different side effects, and drowsiness is one of them.
But that is not the case with second-generation antihistamines.
Call the local emergency number or 911 if a severe allergic reaction develops.