f you’re suffering from major depression, antidepressant medication may relieve some of your symptoms. Antidepressants aren’t a silver bullet for depression, and they come with their own side effects and dangers. Plus, recent studies have raised questions about their effectiveness.

Learning the facts about antidepressants and weighing the benefits against the risks can help you make an informed and personal decision about whether medication is right for you.

This information is not intended to be a substitute for medical advice. If you are taking an antidepressant, do not change your dosage without consulting your physician!

 

Is depression caused by a chemical imbalance in the brain?

You’ve seen it in television ads, read it in newspaper articles, maybe even heard it from your doctor: depression is caused by a chemical imbalance in the brain that medication can correct. According to the chemical imbalance theory, low levels of the brain chemical serotonin lead to depression and depression medication works by bringing serotonin levels back to normal. However, the truth is that researchers know very little about how antidepressants work. There is no test that can measure the amount of serotonin in the living brain—no way to even know what a low or normal level of serotonin is, let alone show that depression medication fixes these levels.

While antidepressant drugs such as Prozac increase serotonin levels in the brain, this doesn’t mean that depression is caused by a serotonin shortage. After all, aspirin may cure a headache, but it doesn’t mean that headaches are caused by an aspirin deficiency. Furthermore, many studies contradict the chemical imbalance theory of depression. Experiments have shown that lowering people’s serotonin levels doesn’t always lower mood, nor does it worsen symptoms in people who are already depressed. And while antidepressants raise serotonin levels within hours, it takes weeks before medication kicks in to relieve depression. If depression were due to low serotonin, there wouldn’t be an antidepressant medication lag.

 

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