Poly Hist Forte Side Effects
Generic name: doxylamine / phenylephrine
Medically reviewed by Drugs.com. Last updated on Feb 17, 2025.
Note: This document provides detailed information about Poly Hist Forte Side Effects associated with doxylamine / phenylephrine. Some dosage forms listed on this page may not apply specifically to the brand name Poly Hist Forte.
Applies to doxylamine / phenylephrine: oral tablet.
Important warnings
This medicine can cause some serious health issues
Do not use this medicine if you have used an MAO inhibitor in the past 14 days, such as isocarboxazid, linezolid, methylene blue injection, phenelzine, rasagiline, selegiline, or tranylcypromine.
Do not use this medicine only to make a child sleepy.
Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using this medicine and call your doctor at once if you have:
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severe dizziness;
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nervousness, trouble sleeping;
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little or no urination; or
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high blood pressure (severe headache, pounding in your neck or ears).
Common side effects may include:
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dizziness, drowsiness;
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dry mouth, nose, or throat;
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constipation;
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blurred vision; or
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feeling restless or excited (especially in children).
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.
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Further information
Poly Hist Forte side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.