Phrenilin Forte Side Effects
Generic Name: acetaminophen / butalbital
Note: This page contains side effects data for the generic drug acetaminophen / butalbital. It is possible that some of the dosage forms included below may not apply to the brand name Phrenilin Forte.
For the Consumer
Applies to acetaminophen / butalbital: capsules, 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 acetaminophen / butalbital:
Dizziness; drowsiness; light-headedness; mild stomach pain; nausea; vomiting.
Severe allergic reactions (rash; hives; itching; difficulty breathing or swallowing; tightness in the chest; swelling of the mouth, face, lips, throat, or tongue); confusion; fainting; fast heartbeat; fever, chills, or persistent sore throat; intoxicated feeling; mental or mood changes; numbness or tingling; red, swollen, blistered, or peeling skin; seizures; severe or persistent drowsiness; shortness of breath; sluggishness; symptoms of liver problems (eg, dark urine, loss of appetite, pale stools, severe stomach pain; yellowing of the skin or eyes); unusual bruising or bleeding; unusual tiredness or weakness.
For Healthcare Professionals
Applies to acetaminophen / butalbital: oral capsule, oral tablet
The most frequently reported adverse events have included drowsiness, lightheadedness, dizziness, sedation, shortness of breath, nausea, vomiting, abdominal pain, and intoxicated feeling.[Ref]
Frequency not reported: Liver failure[Ref]
Acute liver failure has been reported with acetaminophen use; many case have been associated with use at doses in excess of 4 g/day, and often involving more than 1 acetaminophen-containing product.[Ref]
Uncommon (0.1% to 1%): Allergic reactions
Postmarketing reports: Anaphylaxis
Postmarketing reports: Anaphylaxis[Ref]
Uncommon (0.1% to 1%): Hyperhidrosis, pruritus
Frequency not reported: Toxic epidermal necrolysis, erythema multiforme
Rare (less than 0.1%): Serious skin reactions such as acute generalized exanthematous pustulosis, Stevens-Johnson syndrome, and toxic epidermal necrolysis
Frequency not reported: Rash[Ref]
Several cases of dermatologic reactions including toxic epidermal necrolysis and erythema multiforme have been reported.[Ref]
Uncommon (0.1% to 1%): Agitation, euphoria[Ref]
Common (1% to 10%): Drowsiness, lightheadedness, dizziness, sedation
Uncommon (0.1% to 1%): Headache, shaky feeling, tingly, fainting, numbness, seizures, mental confusion, excitement or depression due to intolerance[Ref]
Common (1% to 10%): Shortness of breath
Uncommon (0.1% to 1%): Nasal congestion[Ref]
Common (1% to 10%): Nausea, vomiting, abdominal pain
Uncommon (0.1% to 1%): Dry mouth, difficulty swallowing, heartburn, flatulence, constipation[Ref]
Frequency not reported: Thrombocytopenia, agranulocytosis[Ref]
Uncommon (0.1% to 1%): Tachycardia[Ref]
Uncommon (0.1% to 1%): Leg pain, muscle fatigue[Ref]
Common (1% to 10%): Intoxicated feeling
Uncommon (0.1% to 1%): Fatigue, high energy, heavy eyelids, sluggishness, hot spells, fever, earache, tinnitus[Ref]
Uncommon (0.1% to 1%): Diuresis,[Ref]
1. "Product Information. Allzital (acetaminophen-butalbital)." Skylar Laboratories, Canton, MS.
It is possible that some side effects of Phrenilin Forte may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.
More about Phrenilin Forte (acetaminophen / butalbital)
- Side Effects
- During Pregnancy
- Dosage Information
- Drug Images
- Drug Interactions
- Support Group
- 0 Reviews – Add your own review/rating
- Drug class: analgesic combinations
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