Reprexain 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 this medicine for a long time.

Do not suddenly stop taking this medicine because you may develop a severe reaction. Your body becomes used to this 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 this medicine, the dose will be slowly lowered over time to avoid any side effects.

There are different types of narcotic medicines (opiates). If you take more than one type at the same time or if you are taking another medicine that also causes drowsiness, you may have more side effects. Give your health care provider a list of all medicines you use. Your doctor will tell you how much medicine to take. Do not take more medicine than directed. Call emergency for help if you have problems breathing or unusual sleepiness.

Do not take other medicines that contain aspirin, ibuprofen, or naproxen with this medicine. Side effects such as stomach upset, nausea, or ulcers may be more likely to occur. Many medicines available without a prescription should not be taken with this medicine.

This medicine can cause ulcers and bleeding in the stomach and intestines at any time during treatment. This can happen with no warning and may cause death. There is increased risk with taking this medicine for a long time. Smoking, drinking alcohol, older age, and poor health can also increase risks. Call your doctor right away if you have stomach pain or blood in your vomit or stool.

This medicine does not prevent heart attack or stroke. In fact, this medicine may increase the chance of a heart attack or stroke. The chance may increase with longer use of this medicine and in people who have heart disease. If you take aspirin to prevent heart attack or stroke, talk with your doctor or health care professional.

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.

This medicine will cause constipation. Try to have a bowel movement at least every 2 to 3 days. If you do not have a bowel movement for 3 days, call your doctor or health care professional.

Your mouth may get dry. Chewing sugarless gum or sucking hard candy, and drinking plenty of water may help. Contact your doctor if the problem does not go away or is severe.


Interactions with Medications

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

Bloody stools

burning feeling in the chest or stomach

congestion in the chest

changes in facial skin color



difficulty with swallowing

fast or irregular breathing


frequent urge to urinate


inability to urinate

irregular heartbeat

lightheadedness or dizziness

loss of bladder control

puffiness or swelling of the eyelids or around the eyes

ringing or buzzing in the ears

shortness of breath, troubled breathing, tightness in the chest or wheezing

skin rash, hives, or itching

stomach pain

tenderness in the stomach

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

Symptoms of overdose

Blurred vision

cold or clammy skin


difficulty hearing or ringing or buzzing in the ears


general feeling of illness


mood or mental changes

nausea or vomiting

severe drowsiness

severe stomach pain

skin rash

slow heartbeat

slow or troubled breathing

stiff neck or back

swelling of the face, fingers, feet, or lower legs

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:

More common



dry mouth


increased sweating


pounding heartbeat


trouble in sleeping

unusual tiredness or weakness

Less common or rare

Decreased appetite

decrease in sexual ability




increased thirst


mood or mental changes

mouth ulcers

pain or burning in the throat

runny nose

sensation of burning, warmth, heat, numbness, tightness, or tingling

slurred speech

stomach upset

thinking abnormalities

trembling or shaking of the hands or feet

unexplained weight loss

unusual feeling of well-being

visual disturbances

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.

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