Yes, there are contraindications for the use of Famciclovir. According to the information provided, Famciclovir is a medication used to treat various conditions caused by viruses, such as herpes labialis, herpes zoster, and genital herpes. However, its use should be avoided or approached with caution in certain situations.

The National Center for Biotechnology Information (NCBI) states that Famciclovir is contraindicated in individuals with a history of hypersensitivity to Famciclovir, Penciclovir, or any component of the formulation [1]. Therefore, patients should inform their healthcare providers about any known drug allergies before starting Famciclovir.

Additionally, Famciclovir's use during pregnancy has not been established as safe for the fetus; hence, it should only be used during pregnancy if the potential benefit justifies the potential risk to the fetus [1]. Nursing mothers should also be cautious when using Famciclovir, as it is excreted in human milk, and its effect on nursing infants is unknown [1]. It is recommended that nursing mothers discuss the benefits and risks of using Famciclovir with their healthcare providers.

Furthermore, RxList mentions that Famciclovir's safety and efficacy have not been established in children under 18 years of age, and its use in this population is not recommended [2].

In summary, Famciclovir's contraindications include a history of hypersensitivity to Famciclovir, Penciclovir, or any component of the formulation. Pregnant and nursing women should use Famciclovir with caution, and children under 18 years of age should avoid using it [1][2].

Sources:
[1] https://www.ncbi.nlm.nih.gov/books/NBK557563/
[2] https://www.rxlist.com/famciclovir/generic-drug.htm
[3] https://www.drugpatentwatch.com/p/tradename/FAMCICLOVIR (not used in the response)