(HealthDay News) -- A clinical trial may be just what the doctor ordered for a person who hasn't responded to a standard treatment or is unable to handle its side effects.

The U.S. Food and Drug Administration suggests you should research a clinical trial carefully and ask many questions before you consider participating.

The agency says before joining the trial, you should fully understand:

• What happens before, during and after the trial.
• Full details of the health care you will receive.
• The possibility of being paid for your participation and having trial-related expenses reimbursed.
• All of the possible benefits and risks associated with participation.