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Why should you ask your doctor before taking over-the-counter (OTC) allergy medicines?

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If you're taking a prescription medicine for your allergies, ask your doctor before you also take an OTC medication, especially an antihistamine, for those same symptoms. Using some medicines together can cause more side effects or even set off a dangerous reaction.

Tell your doctor about everything you take: all the pain relievers, remedies, vitamins, and supplements, too.

SOURCES:

Mayo Clinic: "Allergy medications: Know your options."

ConsumerMedSafety.org: "Differences between prescription and OTC medicines."

FDA: "Prescription Drugs and Over-the-Counter (OTC) Drugs: Questions and Answers."

National Eczema Association: "Hydrocortisone FAQ."

Medscape: "Allergic Rhinitis Medication."

MedlinePlus: "Montelukast."

"Using the Antihistamines to Treat: Allergies, Hay Fever, & Hives," Consumer Reports Best Buy Drugs, July 2013.

Gray, S.L. , published online March 2015. JAMA Internal Medicine

American Academy of Allergy, Asthma & Immunology: "When to See an Allergist," "AAAAI Allergy & Asthma Medication Guide."

FamilyDoctor.org: "Antihistamines: Understanding Your OTC Options," "OTC Medicines: Know Your Risks and Reduce Them."

American Medical News: "Doctors pressured to write prescriptions for OTC drugs."

U.S. News & World Report: "What You Don't Know About Your Obamacare Coverage."

HealthyChildren.org: "Allergy Medicine for Children."

Reviewed by Jennifer Robinson on July 20, 2018

SOURCES:

Mayo Clinic: "Allergy medications: Know your options."

ConsumerMedSafety.org: "Differences between prescription and OTC medicines."

FDA: "Prescription Drugs and Over-the-Counter (OTC) Drugs: Questions and Answers."

National Eczema Association: "Hydrocortisone FAQ."

Medscape: "Allergic Rhinitis Medication."

MedlinePlus: "Montelukast."

"Using the Antihistamines to Treat: Allergies, Hay Fever, & Hives," Consumer Reports Best Buy Drugs, July 2013.

Gray, S.L. , published online March 2015. JAMA Internal Medicine

American Academy of Allergy, Asthma & Immunology: "When to See an Allergist," "AAAAI Allergy & Asthma Medication Guide."

FamilyDoctor.org: "Antihistamines: Understanding Your OTC Options," "OTC Medicines: Know Your Risks and Reduce Them."

American Medical News: "Doctors pressured to write prescriptions for OTC drugs."

U.S. News & World Report: "What You Don't Know About Your Obamacare Coverage."

HealthyChildren.org: "Allergy Medicine for Children."

Reviewed by Jennifer Robinson on July 20, 2018

NEXT QUESTION:

How can kids take over-the-counter (OTC) allergy medicines?

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THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.

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