acetaminophen and pentazocine

Tell your doctor if you drink more than three alcoholic beverages per day or if you have ever had alcoholic liver disease (cirrhosis). You may not be able to take medication that contains acetaminophen.

Pentazocine may be habit-forming and should be used only by the person it was prescribed for. Keep the medication in a secure place where others cannot get to it.

This medication can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.

Tell your doctor if the medicine seems to stop working as well in relieving your pain.

Do not use any other over-the-counter cough, cold, allergy, or pain medication without first asking your doctor or pharmacist. Acetaminophen is contained in many cold and pain medicines available over the counter. If you take certain products together you may accidentally take too much acetaminophen. Read the label of any other medicine you are using to see if it contains acetaminophen.

Acetaminophen is a pain reliever and a fever reducer.

Pentazocine is a narcotic pain medicine.

The combination of acetaminophen and pentazocine is used to treat mild to moderate pain.

Acetaminophen and pentazocine may also be used for purposes other than those listed in this medication guide.

Do not use this medication if you are allergic to acetaminophen (Tylenol) or pentazocine.

Pentazocine may be habit-forming and should be used only by the person it was prescribed for. Acetaminophen and pentazocine should never be given to another person, especially someone who has a history of drug abuse or addiction. Keep the medication in a secure place where others cannot get to it.

Before using this medication, tell your doctor if you are allergic to any drugs, of if you have:

• asthma, COPD, sleep apnea, or other breathing disorders;
• liver or kidney disease;
• a history of head injury or brain tumor;
• epilepsy or other seizure disorder;
• low blood pressure;
• a stomach or intestinal disorder;
• curvature of the spine;
• mental illness; or
• a history of drug or alcohol addiction.

If you have any of these conditions, you may not be able to use acetaminophen and pentazocine, or you may need a dosage adjustment or special tests during treatment.

Tell your doctor if you drink more than three alcoholic beverages per day or if you have ever had alcoholic liver disease (cirrhosis). You may not be able to take medication that contains acetaminophen.

FDA pregnancy category C. This medication may be harmful to an unborn baby, and could cause breathing problems or addiction/withdrawal symptoms in a newborn. Tell your doctor if you are pregnant or plan to become pregnant during treatment.

Acetaminophen and pentazocine may pass into breast milk and could harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.

Older adults may be more sensitive to the effects of this medicine.

Take this medication exactly as it was prescribed for you. Do not take the medication in larger amounts, or take it for longer than recommended by your doctor. Follow the directions on your prescription label. Tell your doctor if the medicine seems to stop working as well in relieving your pain.

An overdose of acetaminophen can cause serious harm to your liver. The maximum amount of acetaminophen for adults is 1 gram (1000 mg) per dose and 4 grams (4000 mg) per day. One acetaminophen and pentazocine tablet contains 650 mg of acetaminophen.

Take this medicine with a full glass of water.

Take with food or milk to ease stomach upset.

Drink 6 to 8 full glasses of water daily to help prevent constipation while you are taking acetaminophen and pentazocine. Ask your doctor about ways to increase the fiber in your diet. Do not use a stool softener (laxative) without first asking your doctor.

You may have withdrawal symptoms when you stop using acetaminophen and pentazocine after using it over a long period of time. Do not stop using this medication suddenly without first talking to your doctor. You may need to use less and less before you stop the medication completely.

This medication can cause you to have unusual results with certain urine tests. Tell any doctor who treats you that you are using acetaminophen and pentazocine.

If you need to have any type of surgery, tell the surgeon ahead of time that you are using acetaminophen and pentazocine. You may need to stop using the medicine for a short time.

Store this medication at room temperature away from moisture and heat.

Keep track of how many tablets have been used from each new bottle of this medicine. Pentazocine is a drug of abuse and you should be aware if any person in the household is using this medicine improperly or without a prescription.

Since acetaminophen and pentazocine is taken as needed, you may not be on a dosing schedule. If you are taking the medication regularly, take the missed dose as soon as you remember. If it is almost time for the next dose, skip the missed dose and wait until your next regularly scheduled dose. Do not use extra medicine to make up the missed dose.

Seek emergency medical attention if you think you have used too much of this medicine. An overdose of acetaminophen and pentazocine can be fatal.

Overdose symptoms may include extreme drowsiness, anxiety, nightmares, pinpoint pupils, nausea, vomiting, dark urine, jaundice (yellowing of the skin or eyes), confusion, fainting, weak pulse, coma, blue lips, shallow breathing, or no breathing.

This medication can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.

Do not use any other over-the-counter cough, cold, allergy, or pain medication without first asking your doctor or pharmacist. Acetaminophen is contained in many medicines available over the counter. If you take certain products together you may accidentally take too much acetaminophen. Read the label of any other medicine you are using to see if it contains acetaminophen.

Avoid drinking alcohol while taking acetaminophen and pentazocine. Alcohol may increase your risk of liver damage while taking acetaminophen.

Cold or allergy medicine, narcotic pain medicine, sleeping pills, muscle relaxers, antidepressants, or seizure medication can add to sleepiness caused by pentazocine, or could slow your breathing. Tell your doctor if you need to use any of these other medicines while you are taking acetaminophen and pentazocine.

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have any of these serious side effects:

• fast heart rate;
• shallow breathing, slow heartbeat;
• feeling light-headed, fainting;
• confusion, hallucinations, unusual thoughts or behavior;
• seizure (convulsions);
• easy bruising or bleeding; or
• nausea, stomach pain, loss of appetite, itching, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).

Less serious side effects are more likely to occur, such as:

• feeling dizzy or drowsy;
• mild nausea, vomiting, upset stomach, constipation, diarrhea;
• sweating;
• blurred vision;
• ringing in your ears; or
• dry mouth.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

Before taking this medication, tell your doctor if you are using any of the following drugs:

• glycopyrrolate (Robinul);
• mepenzolate (Cantil);
• atropine (Donnatal, and others), benztropine (Cogentin), dimenhydrinate (Dramamine), methscopolamine (Pamine), or scopolamine (Transderm-Scop);
• bladder or urinary medications such as darifenacin (Enablex), flavoxate (Urispas), oxybutynin (Ditropan, Oxytrol), tolterodine (Detrol), or solifenacin (Vesicare);
• a bronchodilator such as ipratropium (Atrovent) or tiotropium (Spiriva); or
• irritable bowel medications such as dicyclomine (Bentyl), hyoscyamine (Anaspaz, Cystospaz, Levsin, and others), or propantheline (Pro-Banthine).

If you are using any of these drugs, you may not be able to use acetaminophen and pentazocine, or you may need dosage adjustments or special tests during treatment.

There may be other drugs that can affect acetaminophen and pentazocine. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.

Your pharmacist has information about acetaminophen and pentazocine written for health professionals that you may read.