How it worksSafetyHealth libraryOur mission Sign in Start a free consult
Pymander
Free consult

How long does Acyclovir Buccal stay in your system?

Updated Sep 7, 20261 min readAnswer
On this pageShort answer How long Acyclovir Buccal stays in your system Common questions Related questions Sources
Short answer

**Acyclovir buccal has no established time for fully leaving your system, but very little enters your bloodstream.**

The tablet, sold as Sitavig, releases medicine locally as it dissolves on your upper gum. In a small study, the median time it stayed attached was 14 hours, which does not tell you when all the medicine leaves your body. Your kidneys remove absorbed acyclovir, so tell your clinician if you have kidney disease. Let the tablet dissolve naturally without chewing, sucking, or deliberately swallowing it.

How long does Acyclovir Buccal stay in your system? Ask our AI doctor - a straight answer in plain language, free, 24/7. Ask about your exact timing - free Free · Private · 24/7
Find answers about acyclovir buccalStart a free AI doctor consult

How long Acyclovir Buccal stays in your system

1**Start promptly:**Apply your prescribed tablet within one hour of the first tingling or itching, before a cold sore appears.
2**Let it dissolve:**Do not crush, chew, suck, or deliberately swallow your buccal tablet.
3**Protect its placement:**Avoid chewing gum or brushing your teeth while the tablet is attached.
4**Check replacement instructions:**If your tablet falls off within six hours, reposition it or replace it if it will not stick.
5**Discuss kidney disease:**Tell your clinician about kidney problems and other medicines before using acyclovir.

Common questions

How long does Acyclovir Buccal stay in your system?

Acyclovir buccal (Sitavig) has no established time for completely leaving your system. Very little reaches your bloodstream. The tablet releases medicine as it dissolves on your upper gum; in a small study, the median attachment time was 14 hours. Attachment time is different from full drug clearance, so you should not assume it is gone after 14 or 24 hours. Let your prescribed tablet dissolve without chewing or sucking it. Ask your clinician about timing if you have kidney disease or need advice about another medicine.

About this page. Written and maintained by the Pymander Health team. Last updated September 7, 2026.

Questions about this?Start a free consult