Zocor, a cholesterol-cutting drug from Merck and Zoloft, antidepressant from Pfizer are going off patent this month. Merck's patent for Zocor expires Friday while Zoloft loses patent protection on June 30.

According to a report by CNN Money, Zocor had $4.4 billion and Zoloft totaled $3.3 billion in 2005 sales

According to a major Canadian study, elderly people who take a popular type of antidepressant are almost five times more likely to commit suicide than those on other antidepressants.

The researchers stress that pills such as Prozac, Zoloft and Effexor are lifesavers for most seriously depressed seniors, but over-prescription of Selective Serotonin Reuptake Inhibitors (SSRIs) to older people who do not really need them may expose some to an unnecessary risk of self-harm

A new study suggests that antidepressant drugs can also battle cancers, including colorectal cancer.

HealthDay News reports the class of drugs are selective serotonin reuptake inhibitors (SSRIs), such as Prozac, Paxil and Zoloft

According to Georgetown University Medical Center and a Canadian research institute, drugs that treat depression by manipulating the neurotransmitter serotonin in the brain may also affect the patient's immune system in ways that are not yet understood.

Researchers discovered that serotonin is passed between key cells in the immune system, and that the chemical is specifically used to activate an immune response