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Drug interactions between Fiorinal and Vicodin

Results for the following 2 drugs:
Fiorinal (aspirin/butalbital/caffeine)
Vicodin (acetaminophen/hydrocodone)

Interactions between your selected drugs


butalbital ↔ hydrocodone

Applies to:Fiorinal (aspirin/butalbital/caffeine) and Vicodin (acetaminophen/hydrocodone)

Consumer information for this interaction is not currently available.

GENERALLY AVOID: Barbiturates may potentiate the central nervous system (CNS) depressant effects of opioids. Concomitant use may result in profound sedation, respiratory depression, coma, and death. On the other hand, some barbiturates can also induce the hepatic metabolism of opioids that are metabolized by CYP450 3A4 such as butorphanol, fentanyl, hydrocodone, methadone and oxycodone, resulting in enhanced clearance. Reduced efficacy or withdrawal symptoms may occur in patients maintained on their opioid regimen following the addition of a barbiturate. Conversely, discontinuation of the barbiturate may increase plasma concentrations of the opioid and potentiate the risk of overdose and fatal respiratory depression.

MANAGEMENT: The use of opioids in conjunction with other CNS depressants such as barbiturates should generally be avoided unless alternative treatment options are inadequate. If coadministration is necessary, the dosage and duration of each drug should be limited to the minimum required to achieve desired clinical effect, and patients should be closely monitored for signs and symptoms of CNS and respiratory depression. Particular caution is advisable when a barbiturate is added to or withdrawn from therapy in patients receiving opioids that are CYP450 3A4 substrates, as there may be an increased risk of withdrawal symptoms (e.g., restlessness, insomnia, sweating, lacrimation, or rhinorrhea) following initiation of the barbiturate and overdose following discontinuation. A dosage adjustment for one or both drugs may be required.


  1. Bell J, Seres V, Bowron P, Lewis J, Batey R "The use of serum methadone levels in patients receiving methadone maintenance." Clin Pharmacol Ther 43 (1988): 623-9
  2. Liu S-J, Wang RI "Case report of barbiturate-induced enhancement of methadone metabolism and withdrawal syndrome." Am J Psychiatry 141 (1984): 1287-8
  3. Cerner Multum, Inc. "Australian Product Information." O 0
View all 9 references

acetaminophen ↔ butalbital

Applies to:Vicodin (acetaminophen/hydrocodone) and Fiorinal (aspirin/butalbital/caffeine)

Using acetaminophen together with butalbital may alter the effects of acetaminophen and cause serious side effects that may affect your liver. Call your doctor immediately if you experience a fever, chills, joint pain or swelling, excessive tiredness or weakness, unusual bleeding or bruising, skin rash or itching, loss of appetite, nausea, vomiting, or yellowing of the skin or the whites of your eyes. If your doctor does prescribe these medications together, you may need a dose adjustment or special tests to safely take both medications. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Switch to professional interaction data

Drug Interaction Classification

The classifications below are a guideline only. The relevance of a particular drug interaction to a specific patient is difficult to determine using this tool alone given the large number of variables that may apply.

Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.

Do not stop taking any medications without consulting your healthcare provider.

Disclaimer: Every effort has been made to ensure that the information provided by Multum is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. Multum's information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill, knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate that the drug or combination is safe, effective, or appropriate for any given patient. Multum Information Services, Inc. does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. Copyright 2000-2017 Multum Information Services, Inc. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse, or pharmacist.