I take Valacylovir. But there are other anti-viral meds on the market. It works to prevent herpes and shingles in immuno compromised people.
https://www.mayoclinic.org/drugs-supplements/valacyclovir-oral-route/description/drg-20066635

It was part of my artificial immune system while in recovery from my bone marrow transplant. That’s why I’m so grateful to finally be off ALL of them.
For over 2 years I’ve been on daily doses of penicillin, bactrim, an antifungal med, antiviral and tacrolimus~for those who don’t know the med, it’s an anti-inflammatory/anti rejection drug.
So for sure, the Valacyclovir can safely be taken with the immunosuppressive.
I’m finally off the tacro and my new immune system is up and running on its own now!! Fist pump!! (And after 27 childhood/teen/adult vaccinations over the past year, not including the 2 covid and a flu shot)
I do take the antiviral for a while yet even though I’ve had both shingrix shots, to be on the safe side. My transplant doctor said we’ll consider the next step in January when I see him again.