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What does it do?

Diazepam is used to treat seizures and muscle spasms. It is also sometimes used for other conditions.

How is it given?

Diazepam is given as an injection into a vein or muscle.

Can you take other medicines?

Some medicines available without a prescription may react with diazepam including:

  • some antihistamines (may be in anti-allergy, anti-nausea and cough/cold medicines)
  • omeprazole (e.g. Losec®)
  • fluconazole (e.g. Diflucan®) or miconazole (e.g. Daktarin Oral Gel®)

Tell your pharmacist or doctor about all medicines or treatments that you may be taking, including vitamins, herbal products (e.g. St John's wort, valerian) or recreational drugs.

What side effects might you notice?

Side EffectsRecommended action

Slow or shallow breathing, hard to wake up

Change in heartbeat

Trouble with speech or swallowing

Tell your doctor immediately

Mood changes, agitation, unusual behaviour or thinking, loss of coordination, confusion, memory loss, trouble concentrating

Muscle weakness

Tell your doctor

Drowsiness, tiredness, dizziness, headache, changes in vision

Dry mouth, stomach upset

Less interest in sex, trouble peeing

Pain, tenderness or redness at injection site

Tell your doctor if troublesome

If you notice any other effects, discuss them with your doctor or pharmacist.

Other information:

  • Tell your doctor if you have heart, lung or liver problems, a chronic muscle condition (e.g. myasthenia gravis), sleep apnoea or a head injury.
  • Tell your doctor if you are pregnant, planning to become pregnant, or breastfeeding.
  • Diazepam may make you dizzy or sleepy and make it dangerous to drive, operate machinery or do other activities that require you to be alert. Limit alcohol intake because it can increase these effects.
  • If you still feel sleepy the next day, do not drive or operate machinery.

This leaflet contains important, but not all, information about this medicine.

Prepared by the PILs Committee at Christchurch Hospital, Canterbury District Health Board, New Zealand. January 2018

For more general information about this sheet and its contents, see: What does a My Medicines sheet cover?

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About My Medicines

My Medicines Patient Information Leaflets (PILs) contain important, but not all, information about the medicines they describe.

For more information about the sheets, see: What does a My Medicines sheet cover?

My Medicines is developed by a team at the Canterbury District Health Board. Our team is made up of doctors, pharmacists, and a non-medical person to help us keep to plain language. We also discuss our information with specialist health professionals or groups when needed