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Rydex Side Effects

Generic name: brompheniramine / codeine / pseudoephedrine

Medically reviewed by Last updated on Feb 26, 2022.

Note: This document contains side effect information about brompheniramine / codeine / pseudoephedrine. Some dosage forms listed on this page may not apply to the brand name Rydex.

Applies to brompheniramine/codeine/pseudoephedrine: oral liquid.


Frequency not reported: Anaphylactic shock, excessive perspiration, chills


Frequency not reported: Thickening of bronchial secretions, tightness of chest, wheezing, nasal stuffiness, and dryness of mouth, nose and throat


Frequency not reported: Hypotension, palpitations, tachycardia, extra systoles

Nervous system

Frequency not reported: Sedation, dizziness, sleepiness, disturbed coordination, fatigue, confusion, restlessness, excitation, nervousness, tremor, irritability, insomnia, euphoria, paresthesias, vertigo, hysteria, neuritis, tinnitus, acute labyrinthitis, convulsions[Ref]


Frequency not reported: Hemolytic anemia, thrombocytopenia, agranulocytosis


Frequency not reported: Epigastric distress, anorexia, nausea, vomiting, diarrhea, constipation


Frequency not reported: Urinary frequency, difficult urination, urinary retention, early menses


Frequency not reported: Blurred vision, diplopia


Frequency not reported: Urticaria, drug rash, photosensitivity, pruritus

More about Rydex (brompheniramine / codeine / pseudoephedrine)

Related treatment guides


1. "American Geriatrics Society 2015 Updated Beers Criteria for Potentially Inappropriate Medication Use in Older Adults." J Am Geriatr Soc 63 (2015): 2227-46

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.