Acyclovir is an antiviral medication that is used to treat infections caused by herpes viruses. Before using acyclovir, it is important to inform your doctor about all the medications, supplements, and vitamins you are taking to avoid any potential interactions.

According to DrugPatentWatch [1], there are no known drug interactions with acyclovir. However, it is still important to consult with your doctor or pharmacist before taking any new medications with acyclovir.

Mayo Clinic [2] advises that you should inform your doctor if you are taking any medications that affect the kidneys, such as nonsteroidal anti-inflammatory drugs (NSAIDs), as acyclovir is eliminated from the body through the kidneys. This is important because if you are taking other medications that affect the kidneys, it may affect how your body processes acyclovir.

Drugs.com [3] lists a few medications that may interact with acyclovir, including probenecid, which is used to treat gout, and cimetidine, which is used to treat stomach ulcers. Probenecid can increase the concentration of acyclovir in the body, while cimetidine may increase the risk of side effects.

In conclusion, while there are no known major drug interactions with acyclovir, it is still important to inform your doctor about all the medications, supplements, and vitamins you are taking to avoid any potential interactions. Additionally, medications that affect the kidneys, such as NSAIDs, should be used with caution when taking acyclovir.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ACYCLOVIR
[2] https://www.mayoclinic.org/drugs-supplements/acyclovir-oral-route-intravenous-route/before-using/drg-20068393
[3] https://www.drugs.com/drug-interactions/acyclovir.html