Do not rush into a decision about joining a trial. Take time to consider all your options and all the pros and cons. Make sure that you have had time to consider how the trial might affect you. Make sure you have had a chance to discuss all your questions or concerns with the doctor.

It is sensible to adopt a sceptical attitude if you are ever told that a clinical trial has no possible drawbacks or hazards: this is rarely true of any treatment. After all, if we knew that a drug was completely safe and effective, there would not be any need for the trial.
There should be written information provided which you can take away and read at leisure. If a trial is already under way, ask if it is possible to meet or talk to someone who has already taken the drug.

There is nothing wrong in saying 'no' or asking for more time to think about
your decision.

It may be helpful to think about how you reached a decision on an important or complicated question in the past. Perhaps you could talk through the issues with a friend, who may help you to clarify your own views. Or you might find it useful to talk to someone on a telephone helpline; such as those given at the back of this booklet.