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AccuHist Drops Side Effects

Generic name: chlorpheniramine / phenylephrine

Medically reviewed by Last updated on May 7, 2024.

Note: This document contains side effect information about chlorpheniramine / phenylephrine. Some dosage forms listed on this page may not apply to the brand name AccuHist Drops.

Applies to chlorpheniramine / phenylephrine: oral tablet.

Serious side effects of AccuHist Drops

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

Other side effects of AccuHist Drops

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at 1-800-332-1088. You may also report side effects at

For Healthcare Professionals

Applies to chlorpheniramine/phenylephrine: oral capsule extended release, oral drops, oral elixir, oral liquid, oral suspension, oral suspension extended release, oral syrup, oral tablet, oral tablet chewable, oral tablet extended release.

Nervous system

Frequency not reported: Headache, tremor, dizziness, insomnia (phenylephrine); sedation, impaired mental status (chlorpheniramine)[Ref]


Frequency not reported: Elevated blood pressure, tachycardia (phenylephrine)[Ref]


Frequency not reported: Elevated intraocular pressure (phenylephrine)[Ref]


Frequency not reported: Urinary retention (phenylephrine)[Ref]


Frequency not reported: Fatigue (chlorpheniramine)[Ref]


1. Sur DK, Plesa ML (2015) "Treatment of allergic rhinitis." Am Fam Physician, 92, p. 985-92

2. (1998) "PDR Generics." Montvale, NJ: Medical Economics

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.