Acyclovir is an antiviral medication that is used to treat herpes infections. According to Drug Patent Watch [1], there is no evidence of any interaction between acyclovir and birth control pills. However, it is important to note that some medications can interfere with the effectiveness of birth control pills. SingleCare [2] and WebMD [3] both provide a list of medications that can interfere with birth control pills. These lists include antibiotics such as rifampin and tetracycline, antifungal medications such as griseofulvin, and anticonvulsant medications such as carbamazepine and phenytoin. It is important for individuals who are taking birth control pills to talk to their healthcare provider about any medications they are taking to ensure that they do not interfere with the effectiveness of their birth control.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ACYCLOVIR
[2] https://www.singlecare.com/blog/medications-that-interfere-with-birth-control/
[3] https://www.webmd.com/sex/birth-control/medicines-interfere-birth-control-pills