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Unfortunately, no one can write a prescription online for you. Go to the local pharmacy and see if you can get some over-the-counter Amoxycillin 500mg. Take two tablets daily for 5 days and get to a dentist ASAP.
You need X rays to identify the tooth causing the infection , and then you need a root canal or an extraction. Medicines will just delay or slow down the infection temporarily.
Right now please apply ice to your face, to stop the swelling from spreading.
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