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Ive had a constant headache now for nearly 3 weeks. I went to the doctor and he prescribed Codine. I have taken these as requested but when not taking them I still have a headache, and I also very tired and sometimes go light headed?

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  • Dr. Chris November 18, 2010

    There are various causes of a persistent headache. This article may provide some information on other symptoms to allow you to identify a possible cause.

    Muscle spasm is the most common cause of headaches and can result in a persistent headache until the spasm is relieved. However, given your other symptoms, anemia, pregnancy and other hormonal changes and even fluctuations with your blood sugar levels and blood pressure may be responsible.


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