Dr Pertusa is one of London's leading psychiatrists and is known for his biological and cognitive-behavioural approach to mental health. He sees mental health problems emerging from a combination of factors including biology, genetics, upbringing, lifestyle, psychological tendencies and our environment. He believes in promoting a healthy style of living and providing psycho-education as a way to help the person understand and be better able to deal with their psychological, emotional or mental health problems. He has extensive experience in using medication to treat mental health problems. However, in most cases he also explores other options, including psycho-education, talking therapy or lifestyle changes (among others) before considering starting a new medication. He endeavours to empower his patients to be part of the decision-making process regarding the best medication and treatment plan, by discussing the various options including any potential side effects of the medications he suggests.