Thanks for using ' Just Answer ' and i would be glad to assist you.
Macrobid antibiotics ( Nitrofurantoin ) is an antibiotic that is used exclusively for urinary tract infections and it attains anti bacterial concentrations only in urinary tract and are useful only in case of urinary tract infections.
For infection of dental origin, Penicillin ( Amoxicillin ) is the drug of choice. If you are not allergic to Penicillin, i would suggest you to take Amoxicillin 500 mg twice daily for 5 days.
In case of pain, you could take Ibuprofen 400 mg thrice ( maximum - depending upon severity of the pain ) for 3 days.You could go in for warm saline rinses few times a day. Keep optimum oral hygiene in the concerned area. You could also use anti microbial mouth rinses such as chlorhexidine ( 0.12% ).
I would suggest you to fix an appointment with your dentist at the earliest.
Any Further Questions, Revert and i would be glad to Answer.
Kindly Accept the Solution,if 100% Satisfied from my response.
Bonuses would be Appreciated.