Is it necessary to make up the day for one who put cloves on his teeth at night to relieve pain, then rinsed his mouth well, but felt its taste in his throat and mouth after waking up during the day in Ramadan?

Using medication at night for a fasting person is permissible. If a fasting person gargles with medicine before Fajr and only its taste remains, they must take precautions to avoid swallowing the mixed saliva as much as possible. What is swallowed unintentionally appears not to invalidate the fast, because what reaches is merely a taste and not a substance. In Shafi'i jurisprudence, it is a condition to prevent a substance from reaching the internal cavity, not merely a smell or taste.