Alright... so I have a tooth abscess and my dental appointment isn't until wednesday. I can feel it flaring up and have no time to visit the doctor. It's going to be majorly inflamed tomorrow without some antibiotics. Is it safe to take fish medicine? I bought some powdered maracyn (200mg erythromycin, not ideal antibiotic for an abscess, but it'll do.) Only problem is I don't know what other chemicals are in there. I just need something to tide myself over until wednesday. Is this safe?