Would it be a bad idea to have hair transplanted to the beard area if I have a chin implant?

 Chin implant is not a contraindication to beard transplant. Chin implant are fixed deep to the bone while  beard transplant is located superficially. I would advice you to discuss this case with your hair transplant surgeon and follow the appropriate post care after beard transplantation.
It is safe to have a beard transplant even if you have a previous chin implant. Chin implants are fixed deep to the bone while hair transplants to the beard are placed more superficially. I would advice you to discuss with your hair transplant surgeon and follow the appropriate post care after beard transplantation. For the usage of Nizoral shampoo, it is safest to resume after at least 2-3 weeks after hair transplant.

Chin/jaw implants are not a contraindication to having a beard hair transplant. Choosing a hair transplant surgeon who is familiar with chin/jaw implants ie a Plastic Surgeon might be advisable. You should always ask your hair transplant surgeon about post operative graft care and scalp hygiene including shampoos/conditioners as some doctors are very particular about what products can or can’t be used over certain timeframes.