It's totally fine to feed the snake if he will eat, the only caveat being that with daily dosing you will risk regurgitation of the meal. I would give the meds several hours before feeding, so he has time to get over the stress and will be more likely to take his meal. Be as gentle as possible when handling for medication the next day, but it's possible he will regurg. My feeling is it's better to give him the option of eating than not, as regurg is annoying but not really a huge deal. Illness raises metabolic rate, and calories and nutrition are good things for sick animals. Often sick reptiles won't eat, but as long as he is in good body condition I wouldn't stress too much about that.
If in doubt about anything, ask the vet that is treating him.
Glad to hear the dosing is going better. You'll be a pro by the time the treatment is done.![]()