Friday, December 19, 2014

Antidepressants and blood tests




Are there any laboratory tests to determine if my antidepressants are working?

Depression is a chronic illness affecting millions of people. In many people the disorder is under treated. Part of the problem is that there is no specific way to determine if the drugs are working. Most doctors ask the patient for symptoms of depression and if there are none, they assume the drug is working. This subjective way of evaluating drug efficacy is fraught with errors and is very non-specific. For many years, researchers have been trying to develop laboratory methods to assess effectiveness of antidepressants. Several lab markers have been looked at and one called CRP seems to be the best marker to study effectiveness of antidepressant drugs. Unfortunately CRP levels are not specific and need to be serially monitored. This also adds to the cost of care. So far, the only way to judge if you antidepressant is working is the presence or absence of symptoms. If you have depression, you better know the symptoms so that you can tell the doctor. If you do not have any clue, then there is no way for the doctor to know if the medication is working.

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