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Methylphen Side Effects

Generic Name: benzoic acid / hyoscyamine / methenamine / methylene blue / phenyl salicylate

Note: This document contains side effect information about benzoic acid / hyoscyamine / methenamine / methylene blue / phenyl salicylate. Some of the dosage forms listed on this page may not apply to the brand name Methylphen.

Applies to benzoic acid / hyoscyamine / methenamine / methylene blue / phenyl salicylate: oral tablet

Genitourinary

Frequency not reported: Blue to blue-green discoloration of the urine, difficult micturition, acute urinary retention[Ref]

Cardiovascular

Frequency not reported: Tachycardia, flushing[Ref]

Dermatologic

Rare (less than 0.1%): Itching, rash, swelling[Ref]

Gastrointestinal

Frequency not reported: Blue to blue-green discoloration of stools, dry mouth, nausea, vomiting[Ref]

Nervous system

Frequency not reported: Dizziness, drowsiness[Ref]

Hypersensitivity

Rare (less than 0.1%): Allergic reaction (i.e., itching, rash, severe dizziness, swelling, trouble breathing)[Ref]

Respiratory

Rare (less than 0.1%): Dyspnea[Ref]

Ocular

Frequency not reported: Blurred vision[Ref]

References

1. "Product Information. Hyophen (benzoic acid/hyoscy/methen/mblue/phenylsal)." BioComp Pharma, San Antonio, TX.

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

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