You may hear that homeopathics may not work as well with certain foods or substances such as mint or coffee. Researchers have observed that when a homeopathic remedy is administered, then followed by peppermint syrup or peppermint leaves, that the results are still therapeutic. Kids are our best proof in this, as they eat all sorts of things and the homeopathics still work.
I like to advise my patients to avoid food and drink a few minutes either side of the medicine, but in no way will you have to give up coffee or using mint toothpaste (although, I can help you curb your coffee cravings ?).