Fiorinal(redirected from Fortabs)
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butalbital, aspirin, and caffeine†(byoo-tal-bi-tal, as-pir-in, & kaf-een) ,
Pregnancy Category: C
ClassificationTherapeutic: nonopioid analgesics
†For information on aspirin component in formulation, see salicylates monograph
Relief of the symptom complex of tension (or muscle contraction) headaches (use should be short-term only as the butalbital component may be habit-forming).
Contains an analgesic (aspirin) for relief of pain, a barbiturate (butalbital) for its sedative effect, and caffeine, which may be of benefit in tension headaches.
Decreased severity of pain with some sedation.
Absorption: Well absorbed.
Distribution: Widely distributed; crosses the placenta and enters breast milk.
Metabolism and Excretion: Butalbital primarily eliminated by kidneys as unchanged drug or metabolites (59–88% of dose); aspirin and caffeine primarily metabolized by liver.
Half-life: Butalbital = 35 hr; aspirin = 3 hr; caffeine = 3 hr.
|PO||15–30 min||1–2 hr||30 hr|
Contraindicated in: Hypersensitivity to individual components (cross-sensitivity may occur with NSAIDS); Bleeding disorders, thrombocytopenia, or vitamin K deficiency; Severe hepatic disease; Peptic ulcer disease; Porphyria; Pregnancy or lactation; Children (safety and effectiveness not established).
Use Cautiously in: History of suicide attempt or drug addiction; Chronic alcohol use; Severe hepatic or renal disease; Severe cardiovascular disease; Patients concomitantly receiving other CNS depressants; Patients concomitantly receiving warfarin therapy; Severe renal disease; Head injury; Elevated intracranial pressure; Hypothyroidism; Addison's disease; Benign prostatic hyperplasia; Asthma; Geriatric: Appears on Beers list. Geriatric patients are at increased risk for side effects (dosage reduction recommended).
Adverse Reactions/Side Effects
Central nervous system
- drowsiness (most frequent)
- headache (with chronic use)
Ear, Eye, Nose, Throat
- nasal congestion
- respiratory depression
- dry mouth
- epigastric distress
- leg pain
- muscle weakness
- physical dependence
- psychological dependence
Drug-Drug interactionAdditive CNS depression with other CNS depressants, including alcohol, antihistamines, antidepressants, opioid analgesics, and sedative/hypnotics.May increase the liver metabolism and decrease the effectiveness of other drugs including amiodarone, benzodiazepines, bupropion, calcium channel blockers, carbamazepine, citalopram, clarithromycin, cyclosporine, erythromycin, fluoxetine, fluvoxamine, glipizide, hormonal contraceptives, losartan, methadone, mirtazapine, nateglinide, nefazodone, nevirapine, phenytoin, pioglitazone, promethazine, propranolol, protease inhibitors, proton pump inhibitors, rifampin, ropinirole, rosiglitazone, selegiline, sertraline, tacrolimus, theophylline, venlafaxine, voriconazole, warfarin, and zafirlukast.MAO inhibitors, felbamate, primidone, and valproic acid may prevent metabolism and increase the effectiveness of butalbital.May increase the effect of warfarin, oral antidiabetic agents, insulin, 6–mercaptopurine, methotrexate, and NSAIDS.May decrease the effect of probenecid.St. John’s wort may decrease barbiturate effect.Concurrent use of kava kava, valerian, skullcap, chamomile, or hops can increase CNS depression.
Oral (Adults) 1–2 capsules or tablets (50–100 mg butalbital) every 4 hr as needed for pain (should not exceed 6 tablets or capsules/24 hr).
Availability (generic available)
Tablets: 50 mg butalbital/325 mg aspirin/40 mg caffeine
Capsules: 50 mg butalbital/325 mg aspirin/40 mg caffeineIn combination with: codeine. See combination drugs.
- Assess type, location, and intensity of pain before and 60 min following administration.
- Prolonged use may lead to physical and psychological dependence and tolerance. This should not prevent patient from receiving adequate analgesia. Most patients who receive butalbital compound for pain do not develop psychological dependence.
- Assess frequency of use. Frequent, chronic use may lead to daily headaches in headache-prone individuals because of physical dependence on caffeine and other components. Chronic headaches from overmedication are difficult to treat and may require hospitalization for treatment and prophylaxis.
Potential Nursing DiagnosesAcute pain (Indications)
Risk for injury (Side Effects)
- Do not confuse Fiorinal with Fioricet.
- Explain therapeutic value of medication before administration to enhance the analgesic effect.
- Regularly administered doses may be more effective than prn administration. Analgesic is more effective if given before pain becomes severe.
- Medication should be discontinued gradually after long-term use to prevent withdrawal symptoms.
- Oral: Should be administered with food, milk, or a full glass of water to minimize GI irritation.
- Instruct patient to take medication exactly as directed. Do not increase dose because of the habit-forming potential of butalbital. If medication appears less effective after a few weeks, consult health care professional. The dose of aspirin should not exceed the maximum recommended daily dose of 4 g/day. Chronic excessive use of >4 g/day (2 g in chronic alcoholism) may lead to hepatotoxicity, renal or cardiac damage.
- Advise patients with tension headaches to take medication at first sign of headache. Lying down in a quiet, dark room may also be helpful. Medications taken for prophylaxis should be continued.
- May cause drowsiness or dizziness. Advise patient to avoid driving and other activities requiring alertness until response to medication is known.
- Caution patient to avoid concurrent use of alcohol or other CNS depressants.
- Advise patient to report any signs of bleeding, bruising, or ringing in ears to a health care professional.
- Advise patient to use an additional nonhormonal method of contraception while taking butalbital compound.
- Decrease in severity of pain without a significant alteration in level of consciousness.
butalbitalA sedative/ hypnotic of intermediate duration of action, which may be used for tension headaches.
Dizziness, drowsiness, nausea, sedation, euphoria, addiction, diarrhoea, constipation, memory loss.