Sounds odd doesn't it, but remember these drugs take away your memory. So if you've woken up in a strange place with your underwear scattered around the room, if you have physical evidence on your body, if you have sore genital areas, or bruising, you probably have been raped.

Equally if you wake up in your own bed with no idea how or when you got there - its also possible that the drug rapist took you home and had sex with you in your own bed.

If you fear you have been raped whilst under the influence of drugs, taken willingly or not - report it! Go straight to the police and insist that they take a blood and urine sample, it could prove to be vital forensic evidence. Make sure you are accompanied by a friend or even better, a solicitor. Also after the police make sure you visit your doctor or a GU clinic. Never forget the risk of aids.

In order to push a case forward it is vital that the police have the opportunity to take the samples as soon as possible. Rohypnol passes through the system within 48 hours - GHB within twelve so time is of essence - get there and get the tests done - if after some time you wish the case to be dropped at least the police have the initial proof.

If you do not report the incident within 48 hours we still advise reporting the matter to the police - they will not be able to pursue the case but at least they have been warned that a drug rapist is operating on their patch and hopefully they will be on the alert for him.

The police are very anxious to point out that anyone reporting being raped whilst under the effect of drugs will NOT be prosecuted for drug taking and will be treated as a normal rape victim.