Before taking this medication, tell your doctor or pharmacist if you are allergic to aspirin, caffeine, codeine, or butalbital; or to other barbiturates (such as phenobarbital), salicylates (such as salsalate), nonsteroidal anti-inflammatory drugs (such as ibuprofen), opioid pain medications (such as morphine) or xanthine derivatives (such as theophylline); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: asthma (including a history of worsening breathing with runny/stuffy nose after taking aspirin or other NSAIDs), brain disorders (such as seizures, head injury, tumor, increased intracranial pressure), breathing problems (such as chronic obstructive pulmonary disease-COPD, sleep apnea), bleeding/blood clotting disorders (such as hemophilia, von Willebrand's disease, thrombocytopenia), a certain enzyme disorder (porphyria), disease of the pancreas (such as pancreatitis), heart disease (such as irregular heartbeat, recent heart attack), certain enzyme deficiencies (pyruvate kinase or G6-PD deficiency), gout, liver disease, kidney disease, heartburn, growths in the nose (nasal polyps), a certain spinal problem (kyphoscoliosis), gallbladder disease, personal or family history of a substance use disorder (such as overuse of or addiction to drugs/alcohol), mental/mood disorders, stomach/intestinal problems (such as stomach/intestinal ulcers, infectious diarrhea, colitis), adrenal gland problem (such as Addison's disease), difficulty urinating (such as due to enlarged prostate or urethral stricture), underactive thyroid (hypothyroidism), recent bowel/abdominal surgery, obesity.

Before having surgery or certain medical procedures (such as a heart stress test or a procedure to restore a normal heart rhythm if you have an unusually fast heartbeat), tell your doctor or dentist that you use this medication and about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).

This drug may make you dizzy or drowsy. Alcohol or marijuana (cannabis) can make you more dizzy or drowsy. Do not drive, use machinery, or do anything that needs alertness until you can do it safely. Avoid alcoholic beverages. Talk to your doctor if you are using marijuana (cannabis).

This medicine may cause stomach bleeding. Daily use of alcohol and tobacco, especially when combined with this medicine, may increase your risk for stomach bleeding. Avoid alcohol and stop smoking. Consult your doctor or pharmacist for more information.

This medication contains aspirin. Children and teenagers less than 18 years old should not take aspirin if they have chickenpox, flu, or any undiagnosed illness, or if they have just been given a live virus vaccine, without first consulting a doctor about Reye's syndrome, a rare but serious illness.

Older adults may be more sensitive to the side effects of this drug, especially confusion, dizziness, drowsiness, slow/shallow breathing, stomach/intestinal bleeding and ulcers, and trouble falling asleep. Confusion, dizziness, drowsiness and trouble falling asleep can increase the risk of falling.

Before using this medication, women of childbearing age should talk with their doctor(s) about the benefits and risks. Tell your doctor if you are pregnant or if you plan to become pregnant. This medication may harm an unborn baby and cause problems with normal labor/delivery. It is not recommended for use in pregnancy from 20 weeks until delivery. If your doctor decides that you need to use this medication between 20 and 30 weeks of pregnancy, you should use the lowest effective dose for the shortest possible time. You should not use this medication after 30 weeks of pregnancy.

This drug passes into breast milk and could have undesirable effects on a nursing infant. Breastfeeding is not recommended while using this drug. Consult your doctor before breastfeeding.