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A 38-year-old member asked:

can i take acyclovir for a canker sore?

3 doctor answers6 doctors weighed in
Dr. Jonathan Richards
Endodontics 18 years experience
Yes, but...: Not all cankers are viral, so an antiviral may not make any difference. Also, by the time a sore is noticed, it is often time past the window of effectiveness.
Dr. Steven Koos
Oral and Maxillofacial Surgery 21 years experience
Acyclovir: Is for treating herpes simplex, aka cold sore or fever blister. It will not help with aphthous ulcers aka canker sores.
Dr. J. Lawrence Dohan
Dermatology 57 years experience
No benefit: Cankers [APHTHAE] are NOT herpes. Acyclovir does absolutely nothing for them. Usually no treatment is needed. Sometimes they are severe and should be evaluated by a dermatologist.

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Last updated Oct 20, 2019
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