Technically, as soon as you handle it, you are breaking the law. Only the police (that I am aware) have the authority to do this. They are generally very good, however, at turning a blind eye to people who have a legitimate reason for it (ie. this example, doormen at a nightclub etc.), as long as it is immediately passed on to them. To be honest, however, I would agree with the person who suggested dropping it down a drain - they're hardly likely to accuse you of stealing anyway - that would involve admitting to the police that they were in possession of class A drugs! Sounds like the doctor gave you the usual "wait and see" treatment, as per the GP protocol! Hope it fixes itself in time