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Can Acyclovir Be Taken For Cold Sore?

Posted on Mon, 30 Nov 2015

Question: I have developed a cold sore and have not had one since 2010. I have an old prescription for acyclovir that expired 10/11, is it safe to take?
Prescription was famciclovir

Answered by Dr. Rakesh Madhyastha (29 minutes later)

Brief Answer:
Absolute contraindication

Detailed Answer:
Hello

Thanks for the query

I strongly recommend not to use expired acyclovir. Expired drugs usually change its composition over time, it looses its efficacy and potency. One of my patient used expired famciclovir and landed up with severe reaction and complication.
Please do not make the mistake of using this expired product

I hope I was of help, if you have any further queries please get back to me

Regards

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Above answer was peer-reviewed by : Dr. Vaishalee Punj