Q I’ve recently heard that there are many beneficial side effects to cannabis. Is smoking the odd joint going to do me any harm, or is it actually helping me?

Sam, 35

A At the present time, cannabis derived products are only approved in very specific circumstances, namely to treat vomiting caused by chemotherapy and in patients with Multiple Sclerosis, in which case they would be prescribed by a doctor. In the UK, it is illegal to possess, grow or distribute the drug, punishable by a prison sentence. There are also side effects to cannabis and its use even in small amounts has been linked with mental health illnesses, most notably depression and schizophrenia. My advice is that any perceived benefit is outweighed by the risks to health and the law’s stance on the drug.

Q My sixteen year old daughter has bad acne, and despite antibiotics it’s not really got better. Our GP offered us a referral to dermatology and advised us to read up about Roaccutane, but I read somewhere that it can make you feel suicidal. Now I’m really worried.

Aileen

A If acne does not resolve with six months of tablet antibiotics or there is scarring, current guidelines advise referral to a dermatologist. Roaccutane is the trade name for isotretioin. This increases cell turn over, so the top layer of skin sheds, hopefully leaving healthy unmarked skin underneath, and a good cosmetic result. There has been no proven link between roaccutane and increased risk of self-harm. However we do know that persons with acne, even if it is mild, can become very upset by their appearance and often need close monitoring and support if this happens.

If you have a question for Dr Zak, you can email him via askdoctorzak@gmail.com, visit the website doctorzak.co.uk or find him on Twitter @AskDoctorZak

Dr Uddin’s advice is provided in good faith and in accordance with currently accepted evidence.

However, this content is not intended to be a substitute for professional medical advice, diagnosis, or treatment.

You should always seek the advice of a GP, or other qualified health provider, regarding a medical condition.