"I’m 1 day post sinus surgery and would rather use edibles than the narcotic. I’m on the antibiotic Keflex. Is this safe? "
This should be safe. Since it’s sinus surgery I would avoid smoke/ inhalation methods but that shouldn’t be an issue since it looks like you’ll be using edibles. Keflex isn’t metabolized by the cytochrome system in the liver like cannabinoids (it’s mainly excreted directly into urine).