Advertisement

Are there any side effects of diphenhydramine?

Side effects of diphenhydramine may include: constipation; dizziness; vomiting; nausea; headaches; dry mouth, nose or throat; nervousness; excitement; diarrhea; loss of appetite; and drowsiness. Serious side effects include: vision problems and painful or difficult urination. If either of these effects should occur, or if you experience an unusual side effect not listed here, you should contact your doctor immediately. Diphenhydramine may cause an allergic reaction. Symptoms of this include: hives; closing of your throat; swelling of face, tongue or lips; increased chest pain; and difficulty breathing. If this should occur, you should contact your doctor immediately.

Continue Learning about Nasal Agent

What should I know before using an antihistamine nasal spray?
Donna Hill Howes, RNDonna Hill Howes, RN
Some experts suggest that antihistamine nasal spray should not be used for year-round nasal allergy ...
More Answers
What are oral antihistamines?
Univ. of Nev. School of Medicine, Family MedicineUniv. of Nev. School of Medicine, Family Medicine
The most commonly used oral antihistamines are second generation antihistamines such as loratidine (...
More Answers
What are the side effects of chronic nasal spray use?
Lawrence T. Chiaramonte, MDLawrence T. Chiaramonte, MD
Someone whose nose is constantly clogged because of allergic rhinitis will snort nasal sprays like N...
More Answers
What is an antihistamine?
Jumo HealthJumo Health
Antihistamines are medicines that treat mild allergic reactions. Antihistamines come in tablets and ...
More Answers

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.