The biomedical approach is based on the assumption that if a disorder like OCD is caused by a neurochemical imbalance, drugs can be used to alleviate the symptoms. For example, genetic abnormalities that affect the neurotransmitter serotonin can increase vulnerability to OCD, thus drugs that increase serotonin levels - such as SSRIs - may be effective in reducing obsessive thoughts and compulsions.Initially, tricyclic...