Also I will look for articles discussing how people with mental disorders react to societal ways before they were taking prozac. In other words how it helped individuals in an everyday setting. Talking with therapists and a patient of the drug is a good combination. The therapists will give you facts plus opinions and the patient will give effects as well an opinion. You should be able to find some more information in medical journals.
Journals are great sources for any essay.
Once again good start.