Help my husband has severe toothache. The tooth has a hole on it. He also complained about pain in the gum of a previously removed tooth. The tooth was removed about 8 years ago. Why is he feeling the pains now. Please what antibiotics and pain reliever do you prescribe that will be effective. Ge doesn't sleep at night because of the pain. He just started taking 400mg of flagyl 3 times daily for two days now,but it seems not to be working