Can Dosage Of Tylenol Be Increased Along With Zanax To Manage Gastritis Pain?

I had colon resection and am ok with surgery pain but have gastritis pain. Taking Prilosec and Zantac. Eating small amounts of soft foods. Had to be off Prilosec during hospital stay. Can t take Percocet as it. Aides constipation. And do t want to aggravate colon with stool stiffeners or laxatives. Been down this road before. My question is can I take Tylenol 500 mg more than prescribed amount on bottle also taking small dose of zanax to help anxiety from pain.