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Pyrelle HB Side Effects
Generic Name: butabarbital / hyoscyamine / phenazopyridine
Note: This page contains side effects data for the generic drug butabarbital / hyoscyamine / phenazopyridine. It is possible that some of the dosage forms included below may not apply to the brand name Pyrelle HB.
Applies to butabarbital / hyoscyamine / phenazopyridine: tablets
Check with your doctor if any of these most COMMON side effects persist or become bothersome:
Seek medical attention right away if any of these SEVERE side effects occur while taking butabarbital / hyoscyamine / phenazopyridine:
Bloated feeling; blurred vision; clumsiness; constipation; decreased sweating; dizziness; drowsiness; dry mouth; enlarged pupils; excessive daytime drowsiness; excitability; headache; lightheadedness; nausea; trouble sleeping; weakness.
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); agitation; blue or purple skin color; confusion; decreased urination; disorientation; fainting; fast or irregular heartbeat; hallucinations; loss of consciousness; loss of coordination; mental or mood changes (eg, agitation, unusual behavior changes); shortness of breath; unusual tiredness or weakness; vision changes (eg, trouble focusing eyes); yellowing of the skin or eyes.
It is possible that some side effects of Pyrelle HB may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.
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.