Do not take beta blockers if you had an allergic reaction to them in the past. Be careful taking them if you have had a life-threatening allergic reaction to anything in the past. They are likely safe if you have other milder allergies.
Beta blockers may make severe allergic reactions worse. Yet, this is uncommon. They may also keep your medicine for severe allergies from working as well as usual. This may be risky for people who need to use epinephrine, such as an EpiPen™.
Tell your doctor about all your allergies before taking a beta blocker. Your doctor can help decide if beta blockers are right for you.
Telling your doctor is the key when you have an allergy!