How Long Does Fioricet Take to Work?

Edmund Murphy
Dr. David Miles
Written by Edmund Murphy on 22 February 2022
Medically reviewed by Dr. David Miles on 25 November 2024

Fioricet is a prescription medication for tension headaches and migraines, and is known for its relatively quick onset of action. The combination of acetaminophen, butalbital, and caffeine is designed to provide relief within a specific timeframe, but individual responses may vary.

Key takeaways:
  • The half-life of butalbital is approximately 35 hours, which can contribute to prolonged side effects with regular use.
  • Do not take Fioricet if you have recently used MAO inhibitors, such as isocarboxazid, linezolid, or phenelzine, within the last 14 days.
  • If Fioricet provides insufficient relief, consult your doctor. Do not exceed the prescribed dosage.

Fioricet responsiveness and effectiveness

The components of Fioricet work synergistically to relieve pain and relax muscles. The acetaminophen in Fioricet typically provides pain relief within 30-60 minutes of taking the drug, while butalbital takes about two hours to exhibit its muscle-relaxing effects when it is absorbed in the gastrointestinal tract. Caffeine, which enters the bloodstream quickly, helps speed up the effectiveness of the other ingredients.

It’s important to note, however, that the half-life of butalbital is relatively long, averaging 35 hours. This means that the drug’s side effects may accumulate over time with regular use.

What to know before taking Fioricet

Fioricet can have harmful interactions when combined with certain substances. It should not be taken if you've used an MAO inhibitor (such as isocarboxazid, linezolid, phenelzine, rasagiline, selegiline, or tranylcypromine) in the past 14 days.

Fioricet use can also cause an allergic reaction to those sensitive to acetaminophen, butalbital, or caffeine. It should also not be used if you have recently taken sedatives, benzodiazepines, narcotic medications, or used alcohol.

As it is only available under prescription, It is important to inform your doctor if you have one of the below pre-existing medical conditions before starting Fioricet:

  • Porphyria
  • Liver disease (including cirrhosis)
  • Kidney disease
  • Asthma
  • Sleep apnea
  • Breathing disorders
  • Stomach ulcers
  • History of mental illness or substance abuse
  • History of skin conditions resulting from medication
  • If you are using blood thinners

What if Fioricet doesn’t work?

Fioricet typically provides relief within two hours, but if it proves ineffective for your headaches or migraines, consult your doctor. Do not exceed the prescribed dose, as doing so can lead to serious health risks, including overdose.

If you or someone you know is struggling with Fioricet use disorder, consider seeking treatment options. Visit our rehab directory to find a treatment option near you.

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Resources:

  1. Fioricet: 7 things you should know. Retrieved Feb 22, 2022, from

Activity History - Last updated: 25 November 2024, Published date:


Reviewer

David is a seasoned Pharmacist, natural medicines expert, medical reviewer, and pastor. Earning his Doctorate from the Medical University of South Carolina, David received clinical training at several major hospital systems and has worked for various pharmacy chains over the years. His focus and passion has always been taking care of his patients by getting accurate information and thorough education to those who need it most. His motto: "Good Information = Good Outcomes".

Activity History - Medically Reviewed on 15 December 2022 and last checked on 25 November 2024

Medically reviewed by
Dr. David Miles

Dr. David Miles

PharmD

Reviewer

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