There are no negative consequences for long term use of acyclovir or valacyclovir. This has been studied for long term use. If for any reason in the future you develop kidney issues (not from the medicine), you should tell the prescriber and they may change the dose according to kidney function.
The itching could be from the herpes or from any other bacterial or fungal issue that might be going on.
It would be good to know your type for future sexual relationships and to predict frequency of recurrences, yes.
For the record, and it is stated clearly on the website, it can take 3-4 days to get a response here.
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