Why do only an unlucky few get cold sores? The answer may be in your genes.
They can lower the amount of healing time when you take them at the first sign of a cold sore -- like tingly, red, or itchy skin.
You’ll start acyclovir before cold sores fully flare and take it five times a day for 5 days, or you can take valacyclovir at the first sign of a cold sore and then 12 hours later. Famciclovir can be given as a single dose of medicine. So can acyclovir buccal , but instead of swallowing it you place against your gums and it releases the medicine as it dissolves.
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