Has anyone else had side effects from Acyclovir? I've been taking 400 mg twice daily since July and its worked wonders. No ob's.

However in the last few weeks I've developed a sensitivity inside my mouth. I've had to stop wearing my night guard which I've been wearing for years as it now causes a red raw line inside my upper lip. Its almost like the inside of my lip is chapped. The only meds I'm taking is the Acyclovir. Very strange.

Anyone else had anything similar?
Thanks!