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Fiormor Side Effects

Generic name: aspirin / butalbital / caffeine

Medically reviewed by Last updated on Dec 25, 2023.

Note: This document contains side effect information about aspirin / butalbital / caffeine. Some dosage forms listed on this page may not apply to the brand name Fiormor.

Applies to aspirin / butalbital / caffeine: oral capsule, oral tablet.

Serious side effects of Fiormor

Along with its needed effects, aspirin/butalbital/caffeine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking aspirin / butalbital / caffeine:

Less common

Incidence not known

Get emergency help immediately if any of the following symptoms of overdose occur while taking aspirin / butalbital / caffeine:

Symptoms of overdose

Other side effects of Fiormor

Some side effects of aspirin / butalbital / caffeine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

For Healthcare Professionals

Applies to aspirin / butalbital / caffeine: oral capsule, oral tablet.


The most common adverse reactions have included drowsiness and dizziness.[Ref]

Nervous system

Common (1% to 10%): Drowsiness, dizziness

Frequency not reported: Lightheadedness[Ref]


Frequency not reported: Nausea, vomiting, flatulence[Ref]


Frequency not reported: bone marrow suppression[Ref]


Postmarketing reports: Allergic reaction, anaphylactic shock[Ref]


Frequency not reported: toxic epidermal necrolysis, erythema multiforme[Ref]

More about Fiormor (aspirin / butalbital / caffeine)

Patient resources

Other brands

Fiorinal, Fortabs, Laniroif

Professional resources

Other brands


Related treatment guides


1. (2022) "Product Information. Fiorinal (aspirin / butalbital / caffeine)." Actavis (formerly Abrika Pharmaceuticals LLP)

2. (2022) "Product Information. Aspirin/Butalbital/Caffeine (aspirin / butalbital / caffeine)." Major Pharmaceuticals Inc

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.