Butalbital / Acetaminophen Side Effects
What should I watch for?
Tell your doctor or health care professional if your pain does not go away, if it gets worse, or if you have new or a different type of pain. You may develop tolerance to the medicine. Tolerance means that you will need a higher dose of the medicine for pain relief. Tolerance is normal and is expected if you take the medicine for a long time.
Do not suddenly stop taking your medicine because you may develop a severe reaction. Your body becomes used to the medicine. This does NOT mean you are addicted. Addiction is a behavior related to getting and using a drug for a non-medical reason. If you have pain, you have a medical reason to take pain medicine. Your doctor will tell you how much medicine to take. If your doctor wants you to stop the medicine, the dose will be slowly lowered over time to avoid any side effects.
You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol may interfere with the effect of this medicine. Avoid alcoholic drinks.
Do not take other medicines that contain acetaminophen with this medicine. Always read labels carefully. If you have questions, ask your doctor or pharmacist.
If you take too much acetaminophen get medical help right away. Too much acetaminophen can be very dangerous and cause liver damage. Even if you do not have symptoms, it is important to get help right away.
Common and Rare Side Effects
Along with its needed effects, a medicine 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:
Bleeding or crusting sores on lips
fever with or without chills
hive-like swellings (large) on eyelids, face, lips, and/or tongue
muscle cramps or pain
red, thickened, or scaly skin
shortness of breath, troubled breathing, tightness in chest, or wheezing
sores, ulcers, or white spots in mouth (painful)
Symptoms of overdose
Anxiety, confusion, excitement, irritability, nervousness, restlessness, or trouble in sleeping (severe, especially with products containing caffeine)
convulsions (seizures) (for products containing caffeine)
dizziness, lightheadedness, drowsiness, or weakness, (severe)
frequent urination (for products containing caffeine)
hallucinations (seeing, hearing, or feeling things that are not there)
increased sensitivity to touch or pain (for products containing caffeine)
muscle trembling or twitching (for products containing caffeine)
nausea or vomiting, sometimes with blood
ringing or other sounds in ears (for products containing caffeine)
seeing flashes of "zig-zag" lights (for products containing caffeine)
shortness of breath or unusually slow or troubled breathing
slow, fast, or irregular heartbeat
swelling, pain, or tenderness in the upper abdomen or stomach area
unusual movements of the eyes
Check with your doctor as soon as possible if any of the following side effects occur:
unusual excitement (mild)
Bloody or black, tarry stools
pinpoint red spots on skin
swollen or painful glands
unusual bleeding or bruising
unusual tiredness or weakness (mild
Some side effects 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:
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 may report side effects to the FDA at 1-800-FDA-1088.