How does it work?

Pentazocine belongs to a group of medicines called opioids. Opioids mimic the effects of naturally occurring pain reducing chemicals (endorphins). They combine with the opioid receptors in the brain and block the transmission of pain signals. Therefore, even though the cause of the pain may remain, less pain is actually felt.

What is it used for?

Moderate to severe pain

Warning!

This medicine may cause drowsiness. If affected do not drive or operate machinery.

Use with caution in

Asthma

Breathing problems

Cholecystitis - inflammation of the gall bladder.

Decreased kidney function

Decreased liver function

Elderly people

Enlarged prostate gland

Epilepsy

High blood pressure

Hypothyroidism

Inflammation of pancreas

Inflammatory bowel disease such as ulcerative colitis or Crohn's disease

Insufficient production of natural steroid hormones by the adrenal glands (adrenal insufficiency)

Life long inherited blood diseases which can cause a variety of symptoms, including mental health problems (porphyrias)

Low blood pressure (hypotension)

People currently taking monoamine-oxidase inhibitor (MAOI) antidepressants

The period immediately following a heart attack (acute phase - myocardial infarction)

Not to be used in

Alcoholism

Head injury

Heart failure

Increased pressure in the brain (raised intracranial pressure)

Known sensitivity or allergy to any ingredient

Slow, shallow breathing (respiratory depression)

Sudden asthma attack

This medicine should not be used if you are allergic to one or any of its ingredients. Please inform your doctor or pharmacist if you have previously experienced such an allergy. If you feel you have experienced an allergic reaction, stop using this medicine and inform your doctor or pharmacist immediately.

Pregnancy and Breastfeeding

Certain medicines should not be used during pregnancy or breastfeeding. However, other medicines may be safely used in pregnancy or breastfeeding providing the benefits to the mother outweigh the risks to the unborn baby. Always inform your doctor if you are pregnant or planning a pregnancy, before using any medicine.

The safety of this medicine during pregnancy has not been established. Seek medical advice from your doctor.

This medicine should be used with caution by breastfeeding mothers, and only if the expected benefit to the mother is greater than the possible risk to the baby. Seek medical advice from your doctor.

Label warnings

Take this medication with or after food.

This medication may cause drowsiness. If affected do not drive or operate machinery. Avoid alcoholic drink.

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