Nonbac (Oral)

Butalbital, acetaminophen, and caffeine combination is used to relieve tension (or muscle contraction) headaches.

Butalbital is part of a group of medicines called barbiturates. Barbiturates work in the central nervous system (CNS) to create their effects.

Acetaminophen is used to relieve pain and lower fever in patients. It does not become habit-forming when used for a long time. However, acetaminophen may cause other unwanted effects when taken in large doses, including liver damage.

When butalbital is used for a long time, it may become habit-forming, leading to mental or physical dependence. However, people with ongoing pain should not let the fear of dependence stop them from using narcotics to manage their pain. Physical dependence may cause withdrawal side effects if treatment is stopped suddenly. Severe withdrawal side effects can usually be avoided by slowly reducing the dose over time before stopping treatment completely.

Caffeine is a CNS stimulant that is used with pain relievers to enhance their effect. It has also been used for migraine headaches. However, caffeine can also lead to physical dependence when used for a long time. This may result in withdrawal (rebound) headaches when you stop taking it.

This medicine is available only with your doctor's prescription.

It is very important for your doctor to monitor your progress while you or your child are taking this medicine. This helps your doctor see if the medicine is working properly and decide if you should continue taking it.

This medicine may be habit-forming. If you or your child feel that the medicine is not working as well, do not take more than your prescribed dose. Call your doctor for instructions.

Contact your doctor right away if you or your child experience pain or tenderness in the upper stomach, pale stools, dark urine, loss of appetite, nausea, unusual tiredness or weakness, or yellowing of the eyes or skin. These could be signs of a serious liver issue.

Serious skin reactions can happen with this medicine. Contact your doctor immediately if you have blistering, peeling, or loose skin, red skin lesions, severe acne or rash, sores or ulcers on the skin, or fever or chills while using this medicine.

This medicine may cause serious allergic reactions, including anaphylaxis. Anaphylaxis can be life-threatening and requires immediate medical help. Call your doctor right away if you or your child develop a rash, itching, hoarseness, trouble breathing, trouble swallowing, or swelling of the hands, face, or mouth while using this medicine.

This medicine may make you feel dizzy or drowsy. Be sure you know how this medicine affects you before driving, using machines, or doing anything else that could be dangerous if you are dizzy or not alert.

This medicine will enhance the effects of alcohol and other CNS depressants (medications that can cause drowsiness or decreased alertness). Examples of CNS depressants include antihistamines or medications for allergies or colds, sedatives, tranquilizers, or sleeping medications, other prescription pain medications or narcotics, medications for seizures or barbiturates, muscle relaxants, or anesthetics, including some dental anesthetics. Also, there may be a higher risk of liver damage if you consume three or more alcoholic beverages while taking acetaminophen. Do not drink alcoholic beverages, and consult your doctor before taking any of these medications while using this medicine.

Before undergoing any medical tests, inform the medical doctor in charge that you or your child are taking this medicine. The results of some tests may be influenced by this medicine.

Do not take other medicines unless you have discussed them with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.

In deciding to use a medicine, you and your doctor need to consider the risks of taking the medicine against the benefits it may provide. The following points should be kept in mind for this medicine:

Allergies

Inform your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also, let your healthcare provider know if you have other types of allergies, such as allergies to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Pediatric

Studies have not been done to check how butalbital, acetaminophen, and caffeine combination affects children younger than 12 years. Its safety and effectiveness have not been proven for this age group.

Geriatric

Current studies have not shown any specific problems in older adults that would limit the usefulness of butalbital, acetaminophen, and caffeine combination. However, older patients are more likely to have kidney issues related to aging, which may require careful monitoring and possible dose adjustments for those taking this medicine.

Breast Feeding

There are no adequate studies in women to determine the risk to infants when using this medication while breastfeeding. Consider the potential benefits and risks before taking this medication during breastfeeding.

Interactions with Medicines

Some medicines should not be used together at all, while others may be used together even if there is a possibility of interaction. In these cases, your doctor may alter the dose or take other precautions. It's very important for your healthcare provider to know if you are taking any of the medicines listed below. The following interactions have been highlighted for their potential significance and are not necessarily a complete list.

Using this medicine with any of the following medicines is not recommended. Your doctor may choose not to prescribe this medication or modify your other medications.

• Riociguat
• Viloxazine

Using this medicine with any of the following medicines is usually not recommended but may be necessary in some situations. If both medicines are prescribed, your doctor may adjust the dose or frequency of one or both medicines.

• Alfentanil
• Alprazolam
• Amobarbital
• Anisindione
• Aprobarbital
• Barbital
• Butabarbital
• Calcium Oxybate
• Capmatinib
• Carisoprodol
• Chloral Hydrate
• Chlordiazepoxide
• Chlorzoxazone
• Clarithromycin
• Clonazepam
• Clorazepate
• Dantrolene
• Darunavir
• Diazepam
• Dicumarol
• Doxorubicin
• Doxorubicin Hydrochloride Liposome
• Drospirenone
• Esketamine
• Estazolam
• Eterobarb
• Ethchlorvynol
• Ethinyl Estradiol
• Etonogestrel
• Flunitrazepam
• Flurazepam
• Givosiran
• Halazepam
• Heptabarbital
• Hexobarbital
• Imatinib
• Iobenguane I 131
• Isocarboxazid
• Isoniazid
• Ketazolam
• Linezolid
• Lorazepam
• Lormetazepam
• Magnesium Oxybate
• Medazepam
• Mephenesin
• Mephobarbital
• Meprobamate
• Metaxalone
• Methocarbamol
• Methohexital
• Methylene Blue
• Midazolam
• Nifedipine
• Nitrazepam
• Norethindrone
• Norgestimate
• Norgestrel
• Oxazepam
• Ozanimod
• Peginterferon Alfa-2b
• Pentobarbital
• Phenelzine
• Phenindione
• Phenobarbital
• Phenprocoumon
• Piperaquine
• Pixantrone
• Pneumococcal 13-Valent Vaccine, Diphtheria Conjugate
• Potassium Oxybate
• Prazepam
• Primidone
• Procarbazine
• Quazepam
• Rasagiline
• Ritlecitinib
• Safinamide
• Secobarbital
• Selegiline
• Sodium Oxybate
• Temazepam
• Thiopental
• Tocilizumab
• Tranylcypromine
• Trazodone
• Triazolam
• Ulipristal
• Zotepine

Using this medicine with any of the following medicines may increase the risk of certain side effects, but using both drugs may be necessary for your treatment. If both medicines are prescribed, your doctor may adjust the dose or frequency of one or both medicines.

• Acenocoumarol
• Carbamazepine
• Fosphenytoin
• Lixisenatide
• Ospemifene
• Phenytoin
• Prednisone
• St John's Wort
• Warfarin
• Zidovudine

Interactions with Food/Tobacco/Alcohol

Certain medicines should not be taken at the same time as food or specific types of food because of possible interactions. Using alcohol or tobacco with certain medicines can also lead to interactions. The following interactions have been highlighted for their potential significance and are not necessarily a complete list.

Using this medicine with any of the following is usually not recommended but may be unavoidable in some cases. If used together, your doctor may adjust the dose or frequency of this medicine or provide special instructions regarding food, alcohol, or tobacco use.

• Ethanol
• Tobacco

Using this medicine with any of the following may increase the risk of certain side effects, but may be unavoidable in some cases. If used together, your doctor may adjust the dose or frequency of this medicine or provide special instructions regarding food, alcohol, or tobacco use.

• Cabbage

Other Medical Problems

Having other medical issues may affect how this medicine works for you. Be sure to inform your doctor if you have any other medical problems, especially:

• Alcohol abuse, history of or
• Drug dependence, or history of or
• Weakened physical condition—Use with caution. May increase the risk for more serious side effects.

• Kidney disease or
• Liver disease—Use with caution. The effects may be stronger due to slower removal of the medicine from the body.

• Porphyria (an enzyme problem)—Should not be used in patients with this condition.

• Stomach problems—Use with caution. May worsen these conditions.

Along with its needed effects, a medicine can cause some unwanted effects. Not all of these side effects may happen, but if they do, they might require medical attention.

Check with your doctor right away if any of the following side effects occur:

More common

• Lightheadedness
• shortness of breath

Incidence not known

• Abdominal or stomach pain
• black, tarry stools
• bleeding gums
• blistering, peeling, or loosening of the skin
• blood in the urine or stools
• blurred vision
• change in the frequency of urination or amount of urine
• chills
• cough
• diarrhea
• difficulty with breathing
• difficulty with swallowing
• dizziness
• drowsiness
• dry mouth
• fainting
• fast, pounding, or irregular heartbeat or pulse
• flushed or dry skin
• fruit-like breath odor
• hives, itching, or skin rash
• increased hunger
• increased thirst
• increased urination
• joint or muscle pain
• loss of appetite
• nausea or vomiting
• pinpoint red spots on the skin
• puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
• red skin lesions, often with a purple center
• red, irritated eyes
• seizures
• shakiness in the legs, arms, hands, or feet
• sore throat
• sores, ulcers, or white spots in the mouth or on the lips
• sweating
• swelling of the feet or lower legs
• tightness in the chest
• trembling or shaking of the hands or feet
• troubled breathing
• unexplained weight loss
• unusual bleeding or bruising
• unusual tiredness or weakness
• weakness

Get emergency help immediately if any of the following symptoms of overdose occur:

Symptoms of overdose

• Confusion as to time, place, or person
• dark urine
• difficult or painful urination
• dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
• fever
• general feeling of discomfort or illness
• hallucinations
• headache
• holding false beliefs that cannot be changed by fact
• increased sweating
• irregular, fast or slow, or shallow breathing
• light-colored stools
• loss of appetite
• pale or blue lips, fingernails, or skin
• restlessness
• sudden decrease in the amount of urine
• sweating
• trouble sleeping
• unpleasant breath odor
• unusual excitement, nervousness, or restlessness
• vomiting of blood
• yellow eyes or skin

Some side effects may happen that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Your health care professional may also be able to tell you how 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

• Relaxed and calm
• sleepiness

Incidence not known

• Anxiety
• bloated
• constipation
• continuing ringing or buzzing or other unexplained noise in the ears
• depression
• earache
• excess air or gas in the stomach or intestines
• false or unusual sense of well-being
• full feeling
• hearing loss
• heartburn
• heavy eyelids
• high energy
• hot spells
• hyperventilation
• irritability
• numbness
• pain in the leg
• passing gas
• sluggishness
• stuffy nose
• tingling sensation

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You can report side effects to the FDA at 1-800-FDA-1088.

In the U.S.

• Anolor 300
• Dolgic LQ
• Esgic
• Esgic-Plus
• Ezol
• Fioricet
• Geone
• Margesic
• Medigesic
• Nonbac
• Pacaps
• Repan

Available Dosage Forms:

• Tablet
• Capsule
• Solution

Therapeutic Class: Butalbital/Acetaminophen Combination

Pharmacologic Class: Barbiturate

Chemical Class: Methylxanthine

Take this medicine only as directed by your doctor. Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered. If too much of this medicine is taken for a long time, it may become habit-forming and cause mental or physical dependence. Also, large amounts of acetaminophen may cause liver damage if taken for a long time.

Carefully check the labels of all other medicines you are using, because they may also contain acetaminophen. It is not safe to use more than 4 grams (4,000 milligrams) of acetaminophen in one day (24 hours).

Dosing

The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

• For oral dosage forms (capsules or tablets):For tension headaches: Adults and children 12 years of age and older—One or two capsules or tablets every 4 hours as needed. However, the dose is usually not more than 6 capsules or tablets per day. Do not exceed 4 grams (4000 milligrams) of acetaminophen (Tylenol®) per day. Children younger than 12 years of age—Use and dose must be determined by your doctor.

Missed Dose

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

Storage

Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.

Keep out of the reach of children.

Do not keep outdated medicine or medicine no longer needed.

Ask your healthcare professional how you should dispose of any medicine you do not use.