AccuHist PDX Drops

Name: AccuHist PDX Drops


Cough Suppressant
Nasal Decongestant


Children 6 to 12 years of age: 2 mL every 4 hours
Children under 6 years of age: Consult a physician.
Do not exceed 6 doses during a 24-hour period or as directed by a physician.

Other Information

Store at 20°-25°C (68°-77°F).
Under Federal Law, this product is available without a prescription. Certain laws may differ.

AccuHist PDX Drops Drug Class

AccuHist PDX Drops is part of the drug classes:

  • Substituted alkylamines

  • Opium alkaloids and derivatives

  • Sympathomimetics

What are some side effects that I need to call my doctor about right away?

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:

  • Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.

For Healthcare Professionals

Applies to chlorpheniramine / dextromethorphan / phenylephrine: oral drops, oral liquid, oral syrup, oral tablet effervescent, oral tablet extended release


Gastrointestinal side effects have included vomiting, diarrhea, dry mouth, nausea, anorexia, heartburn, and GI disturbance.[Ref]

Nervous system

Nervous system side effects have included sedation, drowsiness, dizziness, nervousness, headache, convulsions, central nervous system stimulation, hallucinations, tremors, and insomnia.[Ref]


Cardiovascular side effects have included cardiac arrhythmias, increased heart rate, and increased blood pressure.[Ref]


General side effects have included weakness and pallor.[Ref]


Genitourinary side effects have included polyuria and dysuria. Urinary retention may occur in patients with prostatic hypertrophy.[Ref]


Respiratory side effects have included respiratory difficulties.[Ref]


Ocular side effects have included diplopia.[Ref]

Some side effects of chlorpheniramine / dextromethorphan / phenylephrine may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.


Data not available

Chlorpheniramine / dextromethorphan / phenylephrine Pregnancy Warnings

Chlorpheniramine/dextromethorphan/phenylephrine has been assigned to pregnancy category C by the FDA. Animal studies have not been reported. There are no controlled data in human pregnancy. Chlorpheniramine/dextromethorphan/phenylephrine is only recommended for use during pregnancy when benefit outweighs risk.