"Approximately 70 percent of people taking SSRIs suffer from sexual side effects. But these drugs may also compromise the ability to feel love.

Rutgers University anthropologist Helen Fisher, for one, believes SSRIs are wreaking havoc on human courtship. SSRIs alleviate depression by upping the levels of serotonin in the brain and curbing the production of the neurotransmitter dopamine. Unfortunately, dopamine is also responsible for the feelings of elation and ecstasy that accompany falling in love. By suppressing dopamine, Fisher argues, drugs like Prozac block your ability to have these feelings, thus making it harder to fall in love and stay in love.

This dopamine deficit affects people in a variety of ways, according to Fisher and her research partner, Virginia-based psychiatrist J. Andrew Thomson, Jr. Singles using antidepressants may have a harder time meeting people, because their natural sexual response is dampened. Some researchers believe desire was designed to help people select mates who are genetically suited to them. The spark that ignites on meeting someone new is telling you something: This might be your match. When you miss those signals, your odds of finding an appropriate mate decrease.

Even if you're one of the lucky ones who manage to find love while taking SSRIs, you still have some obstacles to overcome, says Fisher. Like Megan, you may lose the ability to orgasm, and this could cause long-term relationship issues. Orgasms trigger the release of the hormone oxytocin—one that has been linked with pair bonding. Indeed, those who fail to orgasm, thanks to SSRIs, may be at a distinct disadvantage when it comes to mating and bonding."