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 when you first start taking the medicine or change doses. Do not drive, use machinery, or do anything that may be dangerous until you know how the medicine affects you. Stand or sit up slowly.
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:
Less common or rare
may mean that a serious allergic reaction is occurring
Bluish discoloration or flushing or redness of skin (occurring together with other effects listed in this section)
difficulty in swallowing
dizziness or feeling faint (severe)
hive-like swellings (large) on eyelids, face, lips, or tongue
stuffy nose (occurring together with other effects listed in this section)
Bleeding or crusting sores on lips
fever with or without chills
red, thickened, or scaly skin
sores, ulcers, or white spots in mouth (painful)
sore throat (unexplained)
tenderness, burning, or peeling of skin
Symptoms of overdose
Anxiety, confusion, excitement, irritability, nervousness, restlessness, or trouble in sleeping (severe, especially with products containing caffeine)
convulsions (seizures, with products containing caffeine)
diarrhea (severe or continuing)
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 (severe or continuing), sometimes with blood
ringing or buzzing in ears (continuing) or hearing loss
seeing flashes of "zig-zag" lights (for products containing caffeine)
slow, fast, or irregular heartbeat
slow, fast, irregular, or troubled breathing
stomach pain (severe)
uncontrollable flapping movements of the hands, especially in elderly patients
unusual movements of the eyes
Check with your doctor as soon as possible if any of the following side effects occur:
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.