Rohypnol is used for sleep problems (insomnia). Rohypnol will be prescribed for as short a time as possible. This will normally be from a few days up to a maximum of four weeks.

Why have I been prescribed Rohypnol?

  • Rohypnol is used for sleep problems (insomnia).
  • Rohypnol will be prescribed for as short a time as possible.
  • This will normally be from a few days up to a maximum of four weeks.

How does it work?

  • Rohypnol belongs to a group of medicines called benzodiazepines.
  • These work by increasing the amount of a certain chemical in the brain which calms the brain down and stops the nerves firing inappropriately.

When and how do I take it?

Rohypnol tablets should be swallowed with a drink of water just before going to bed.

What’s the dose?


  • The usual dose is between 0.5 mg and 1 mg (½ and 1 tablet), taken just before going to bed.
  • The maximum dose of Rohypnol is 2 mg.
  • You will normally take the medicine for no more than 4 weeks.

Could it interact with other tablets?

Please tell your doctor or pharmacist if you are taking or have recently taken any other medicines. This includes medicines that you buy without a prescription and herbal medicines. This is because Rohypnol can affect the way some other medicines work. Also some other medicines can affect the way Rohypnol works.

In particular, tell your doctor or pharmacist if you are taking any of the following medicines:

  • Medicines to treat mental health problems.
  • Medicines for allergies, which make you sleepy.
  • Other Medicines to help you sleep.
  • Phenytoin or other medicines to treat epilepsy.
  • Cimetidine (used to treat stomach problems and heartburn).
  • Strong painkillers (such as morphine).
  • Rifampicin (an antibiotic used to treat infections).

If any of the above apply to you, or if you are not sure, talk to your doctor or pharmacist before you take Rohypnol.

Herbal products should also only be taken after talking with your doctor.

What are the possible risks or side-effects?

Like all medicines Rohypnol can cause side effects, although not everybody will get them.

Stop taking Rohypnol and see a doctor straight way if you notice any of the following serious side effects-you may need urgent medical treatment:

  • Chest pain which may spread to your neck and shoulders and down your left arm. This may be a sign of a heart attack.
  • Allergic reactions. Signs include sudden swelling of the throat, face lips and mouth. This may make it difficult to breathe or swallow. Other signs include sudden swelling of the hands, feet and ankles, skin rash or itching.
  • Breathing problems (respiratory depression). Early signs include suddenly noisy, difficult and uneven breathing. Your skin may become blue.
  • A feeling of fullness in your bladder and the urge to pass water, but then difficulty emptying the bladder.
  • Being restless, aggressive, angry, irritable or agitated.
  • Nightmares and seeing or possibly hearing things that are not really there (hallucinations).
  • Mental problems such as, delusions (believing in things that are not real) or losing contact with reality.
  • A change in your behaviour that is out of character.

When you start taking Rohypnol you may notice the following effects:

  • Feeling tired.
  • Weak muscles.
  • Headache.
  • Feeling dizzy.
  • Being less alert.
  • Feeling confused.
  • Poor co-ordination, including feeling unsteady when you walk.
  • Problems with your eye-sight (double vision).

These effects usually go away after some time. If you are worried talk to your doctor or pharmacist.

Can I drink alcohol while taking it?

Do not drink alcohol with this medicine.

What if I’m pregnant/breastfeeding?

Talk to your doctor before taking Rohypnol if you are pregnant, trying to get pregnant, or breast-feeding. Your doctor will then decide if you should take Rohypnol. This is because Rohypnol will affect your baby. If you are already taking Rohypnol talk to your doctor immediately, he will decide if you should stop taking this medicine.


If you have any more questions please ask your Pharmacist.

Remember to keep all medicines out of reach of children
Please Note:
We have made every effort to ensure that the content of this information sheet is correct at time of publish, but remember that information about drugs may change. This sheet does not list all the uses and side-effects associated with this drug. For full details please see the drug information leaflet which comes with your medicine. Your doctor will assess your medical circumstances and draw your attention to any information or side-effects which may be relevant in your particular case.



Health Reference: Insomnia