Description and Brand Names

Drug information provided by: Micromedex

US Brand Name

  1. Talwin NX

Descriptions


Pentazocine and naloxone combination is used to relieve moderate to severe pain.

Pentazocine belongs to the group of medicines called narcotic analgesics (pain medicines). It acts on the central nervous system (CNS) to relieve pain.

Naloxone is an opioid antagonist. It acts on the CNS to block the effects of narcotics, especially the "high'' feeling that makes you want to use them. It will not produce any narcotic-like effects or cause mental or physical dependence.

When pentazocine is used for a long time, it may become habit-forming, causing mental or physical dependence. However, people who have continuing pain should not let the fear of dependence keep them from using narcotics to relieve their pain. Mental dependence (addiction) is not likely to occur when narcotics are used for this purpose. Physical dependence may lead to withdrawal side effects if treatment is stopped suddenly. However, severe withdrawal side effects can usually be prevented by gradually reducing the dose over a period of time before treatment is stopped completely.

This medicine is available only with your doctor's prescription.

This product is available in the following dosage forms:

  • Tablet

Before Using

In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:

Allergies

Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Pediatric

Appropriate studies have not been performed on the relationship of age to the effects of pentazocine and naloxone combination in children younger than 12 years of age. Safety and efficacy have not been established.

Geriatric

Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of pentazocine and naloxone combination in the elderly. However, elderly patients are more likely to have age-related liver, kidney, or heart problems, which may require caution and an adjustment in the dose for patients receiving pentazocine and naloxone combination.

Pregnancy

Information about this pentazocine-and-naloxone-oral-route
Pregnancy Category Explanation
All Trimesters C Animal studies have shown an adverse effect and there are no adequate studies in pregnant women OR no animal studies have been conducted and there are no adequate studies in pregnant women.

Breastfeeding

There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.

Drug Interactions

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

  • Alfentanil
  • Almotriptan
  • Alphaprodine
  • Amitriptyline
  • Buprenorphine
  • Codeine
  • Desvenlafaxine
  • Dihydrocodeine
  • Fentanyl
  • Fluoxetine
  • Fospropofol
  • Hydrocodone
  • Hydromorphone
  • Hydroxytryptophan
  • Levomilnacipran
  • Levorphanol
  • Lorcaserin
  • Meperidine
  • Methadone
  • Morphine
  • Morphine Sulfate Liposome
  • Oxycodone
  • Oxymorphone
  • Propoxyphene
  • Selegiline
  • Sibutramine
  • Sufentanil
  • Suvorexant
  • Tapentadol
  • Tramadol
  • Trazodone
  • Vortioxetine

Using this medicine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

  • Clonidine
  • Yohimbine

Other Interactions

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following may cause an increased risk of certain side effects but may be unavoidable in some cases. If used together, your doctor may change the dose or how often you use this medicine, or give you special instructions about the use of food, alcohol, or tobacco.

  • Ethanol

Other Medical Problems

The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:

  • Addison's disease (adrenal gland problem) or
  • Alcohol abuse, or history of or
  • Asthma, severe or
  • Brain tumor, history of or
  • Breathing problems, severe (e.g., hypoxia, hypercapnia) or
  • Cholecystitis (inflammation of the gallbladder) or
  • Chronic obstructive pulmonary disease (COPD) or
  • Cor pulmonale (serious heart condition) or
  • Drug dependence, especially with narcotics, or history of or
  • Enlarged prostate (BPH, prostatic hypertrophy) or
  • Gallbladder disease or gallstones or
  • Head injuries, history of or
  • Hypothyroidism (an underactive thyroid) or
  • Intestinal or bowel blockage or
  • Kyphoscoliosis (severe curvature of the spine with breathing problems) or
  • Mental illness, history of or
  • Pancreatitis (inflammation of the pancreas) or
  • Problems with passing urine or
  • Respiratory depression (very slow breathing) or
  • Stomach or digestive problems (e.g., slow or inflamed bowels)—Use with caution. May increase risk for more serious side effects.
  • Heart attack, recent or
  • Heart or blood vessel disease or
  • Hypertension (high blood pressure) or
  • Porphyria (an enzyme problem) or
  • Seizures, history of—Use with caution. May make these conditions worse.
  • Kidney disease or
  • Liver disease—Use with caution. The effects may be increased because of slower removal of the medicine from the body.

Proper Use

Take this medicine only as directed by your doctor. Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered. This is especially important for elderly patients, who may be more sensitive to the effects of pain medicines. If too much of this medicine is taken for a long time, it may become habit-forming (causing mental or physical dependence).

Tell your doctor if you smoke tobacco. Smoking may change how well this medicine works.

Dosing

The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

  • For oral dosage form (tablet):
    • For moderate to severe pain:
      • Adults, teenagers, and children 12 years of age and older—At first, one tablet every 3 or 4 hours as needed. Your doctor may adjust your dose as needed. However, the dose is usually not more than 12 tablets per day.
      • Children younger than 12 years of age—Use and dose must be determined by your doctor.

Missed Dose

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

Storage

Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.

Keep out of the reach of children.

Do not keep outdated medicine or medicine no longer needed.

Ask your healthcare professional how you should dispose of any medicine you do not use.

Make sure you store the medicine in a safe and secure place to prevent others from getting it.

Precautions

It is very important that your doctor check the progress of you or your child while you are using this medicine. This will allow your doctor to see if the medicine is working properly and to decide if you or your child should continue to take it.

This medicine will add to the effects of alcohol and other CNS depressants (medicines that can make you drowsy or less alert). Some examples of CNS depressants are antihistamines or medicine for allergies or colds; sedatives, tranquilizers, or sleeping medicine; other prescription pain medicine or narcotics; medicine for seizures or barbiturates; muscle relaxants; or anesthetics, including some dental anesthetics. Check with your doctor before you or your child take any of the medicines listed above while you are using this medicine.

This medicine may be habit-forming. If you or your child feel that the medicine is not working as well, do not use more than your prescribed dose. Call your doctor for instructions.

This medicine may make you dizzy, drowsy, or lightheaded. Make sure you know how you react to this medicine before you drive, use machines, or do anything else that could be dangerous if you are dizzy or not alert.

Using narcotics for a long time can cause severe constipation. To prevent this, your doctor may direct you or your child to take laxatives, drink a lot of fluids, or increase the amount of fiber in your diet. Be sure to follow the directions carefully, because continuing constipation can lead to more serious problems.

If you or your child have been using this medicine regularly for several weeks or longer, do not change your dose or suddenly stop using it without checking with your doctor. Your doctor may want you or your child to gradually reduce the amount you are using before stopping it completely. This may help prevent worsening of your condition and reduce the possibility of withdrawal symptoms, such as abdominal or stomach cramps, anxiety, fever, nausea, runny nose, sweating, tremors, or trouble with sleeping.

Using this medicine while you are pregnant may cause serious unwanted effects in your newborn baby. Tell your doctor right away if you think you are pregnant or if you plan to become pregnant while using this medicine.

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.

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:

Rare

  1. Black, tarry stools
  2. chest pain
  3. chills
  4. cough or hoarseness
  5. difficult or troubled breathing
  6. fever
  7. fever with or without chills
  8. general feeling of tiredness or weakness
  9. irregular, fast or slow, or shallow breathing
  10. lower back or side pain
  11. painful or difficult urination
  12. pale or blue lips, fingernails, or skin
  13. shakiness in the legs, arms, hands, or feet
  14. shortness of breath
  15. sore throat
  16. sores, ulcers, or white spots on the lips or in the mouth
  17. swollen glands
  18. trembling or shaking of the hands or feet
  19. unusual bleeding or bruising
  20. unusual tiredness or weakness

Incidence not known

  1. Blistering, peeling, or loosening of the skin
  2. blurred vision
  3. burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
  4. confusion
  5. decrease in the frequency of urination
  6. diarrhea
  7. difficulty in passing urine (dribbling)
  8. difficulty with swallowing
  9. dizziness
  10. dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
  11. fainting
  12. fast, slow, pounding, or irregular heartbeat or pulse
  13. feeling of warmth
  14. headache
  15. hives
  16. itching
  17. joint or muscle pain
  18. loss of bladder control
  19. loss of consciousness
  20. nervousness
  21. pounding in the ears
  22. puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
  23. rapid breathing
  24. red skin lesions, often with a purple center
  25. red, irritated eyes
  26. redness of the face, neck, arms, and occasionally, upper chest
  27. skin rash
  28. sweating
  29. swelling of the lower legs or arms
  30. swelling of the face
  31. tightness in the chest
  32. total body jerking
  33. upper abdominal or stomach pain
  34. weight gain
  35. wheezing

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

Symptoms of overdose

  1. Seeing, hearing, or feeling things that are not there
  2. seizures (convulsions)
  3. sleepiness or unusual drowsiness

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:

Rare

  1. Abdominal or stomach distress
  2. hives or welts
  3. redness of the skin

Incidence not known

  1. Blistering, crusting, irritation, itching, or reddening of the skin
  2. confusion about identity, place, and time
  3. constipation
  4. constricted, pinpoint, or small pupils (black part of the eye)
  5. continuing ringing or buzzing or other unexplained noise in the ears
  6. cracked, dry, or scaly skin
  7. depression
  8. difficulty in focusing the eyes
  9. disturbed dreams
  10. drowsiness
  11. dry mouth
  12. excitement
  13. false or unusual sense of well-being
  14. hearing loss
  15. irritability
  16. lightheadedness
  17. loss of appetite
  18. mood or mental changes
  19. nausea
  20. relaxed and calm feeling
  21. trouble with sleeping
  22. unable to sleep
  23. vomiting
  24. weakness
  25. weight loss

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.