A life-threatening allergic reaction (anaphylaxis) can cause shock, a sudden drop in blood pressure and trouble breathing. In people who have an allergy, anaphylaxis can occur minutes after exposure to a specific allergy-causing substance (allergen). In some cases, there may be a delayed reaction, or anaphylaxis may occur without an obvious trigger. Show If you're with someone having an allergic reaction with signs of anaphylaxis:
If you're with someone having symptoms of anaphylaxis, don't wait to see whether symptoms get better. Seek emergency treatment right away. In severe cases, untreated anaphylaxis can lead to death within half an hour. An antihistamine pill, such as diphenhydramine (Benadryl), isn't enough to treat anaphylaxis. These medications can help relieve allergy symptoms, but they work too slowly in a severe reaction. Symptoms of anaphylaxis include:
Some common anaphylaxis triggers include:
If you've had any kind of severe allergic reaction in the past, ask your doctor if you should be prescribed an epinephrine autoinjector to carry with you. Sign up for
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. How long does Benadryl take to work on allergic reaction?It normally takes about 30 minutes to work. Common side effects include feeling sleepy, dizzy or unsteady on your feet. You may also have difficulty concentrating and have a dry mouth.
Will Benadryl clear up an allergic reaction?An antihistamine pill, such as diphenhydramine (Benadryl), isn't enough to treat anaphylaxis. These medications can help relieve allergy symptoms, but they work too slowly in a severe reaction.
How do you take Benadryl for allergic reaction?Take 1 to 2 tablets every 4 to 6 hours or as directed by a doctor. Take 1 tablet every 4 to 6 hours or as directed by a doctor. Do not use. Do not take more than 6 doses in 24 hours.
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How much benadryl should i take for an allergic reaction
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