Famciclovir is a medication used to treat various infections caused by certain types of viruses. According to the information provided, there are several drugs that can interact with Famciclovir. It is essential to be aware of these interactions to ensure safe and effective treatment.

Based on the available information from [2] and [3], the following drugs are known to interact with Famciclovir:

1. Probenecid: This medication can increase the levels of Famciclovir in the body, which may increase the risk of side effects.
2. Antacids: Taking antacids containing aluminum and magnesium can reduce the absorption of Famciclovir, potentially decreasing its effectiveness.
3. Other antiviral medications: Specifically, Ritonavir and other protease inhibitors can increase the levels of Famciclovir in the body, potentially leading to an increased risk of side effects.

It is crucial to consult a healthcare professional or pharmacist for a comprehensive understanding of potential drug interactions, as this list may not be exhaustive. Additionally, informing healthcare providers of all medications being taken, including over-the-counter drugs, supplements, and herbal remedies, can help ensure safe and effective treatment.

Sources:
[1] <https://www.drugpatentwatch.com/p/tradename/FAMCICLOVIR>
[2] <https://www.drugs.com/drug-interactions/famciclovir.html>
[3] <https://www.rxlist.com/famciclovir/generic-drug.htm>