|MadSci Network: Medicine|
Mr. Bayan, While many doctors disagree on this subject, they all agree with this fact: Excessive acidity will decrease the effectiveness of any antibiotic. It would follow, then, that one would want to avoid excessive amounts of acidic foods, where possible, in order to promote the effectiveness of the medication. However, most antibiotics are taken orally and fuly digested within an hour of ingestion, so it would probably be safe to have ascorbic acid (vitamin C) in between dosages. To be safe, take your pills, wait thiry minutes to an hour, and then have your vitamin C. Both will do you good.
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