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A 30-year-old female asked:

Diarrhea, light headed, head ache & hot flashes. could i b dehydrated. or vitamin c interaction from 1 tablet last night? didn't eat much today...

1 doctor answer2 doctors weighed in
Dr. Brian Clear
A Verified Doctoranswered
Family Medicine 14 years experience
Certainly could be: Dehydration is always a concern with diarrhea and would be the most likely explanation for developing light-headedness after/with a period of diarrhea. The headache and heat intolerance may be related as well but are less likely to improve simply with hydration. The vitamin C is not a likely cause here. Drinking plenty of fluids, water, sports drinks, thin soup/broth, will be important.
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Last updated Nov 8, 2015

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