Not long after his diagnosis with Parkinson’s disease, Steve starts chatting to camgirls online. But soon he’s going on the sites every night, even logging on while his wife’s asleep next to him in bed. How long can he keep it a secret?

Steve’s one of more than 200 people who contacted BBC Investigations correspondent Noel Titheradge about their experiences of side effects caused by dopamine agonist drugs.

When medications turn out to have life-changing side effects, how do we balance the benefits with the risks?

Details of organisations offering help and support with some of the issues raised are available at bbc.co.uk/actionline.

If you have any concerns about medication you’re taking, speak to your doctor.

Presenter: Noel Titheradge