Need evaluation: Without further info/knowledge of health history, it's not possible to give individual diagnosis in this forum. General info: Fainting when getting blood drawn can be a "vasovagal" response: Blood pressure drops suddenly during emotional/physical stress.Headache/sleepiness can occur after.Although not usually a sign of serious illness if no health problems,deserves opinion from doc who knows you.
Answered 1/8/2015
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