Early in his career he got interested on in Complementary medicine, and became a cofounder of the British Holistic Medical Association in 1983.
His career includes being a Principal Doctor at the Bristol Cancer Help Centre (nowadays called the Penny Brohn Centre)
He has over thirty years of experience as a GP working both for the NHS as well as in private clinics in the UK and in South Africa.
Dr. Wetzler speaks five languages, German, French, Spanish and Portuguese, and some Yiddish, alongside his native English.
His broad experience and knowledge of orthodox medicine as well as holistic approaches, nutrition and use of natural medicines helps him choose the most effective treatment for each patient.
He has added special interests over the years including approaches to thyroid problems (as advertised through thyroid uk) cancer care including iv infusions and other supportive therapy, eczema care, supported by the approach of Dr Aron (can google his name) and Lyme Disease.
He has also been using healing approaches such as Life Alignment and visualisation approaches such as 'The Journey'