More than 70 percent of people on these drugs don't need them, a survey of 700 people by the Rand Corp. found. While the drugs can treat clinical depression, they may not be needed for milder forms. Also, get a scrip from a psychiatrist, not a primary-care doc.
Alternatives: As little as 35 minutes of vigorous exercise a day can help treat depression. Avoiding processed foods can also reduce risk by as much as 58 percent, says a British study. Also try omega-3, vitamin D, and probiotics supplements.