If you are taking pain reliever and have taken antibiotics and you are having a reoccuring fever of 99.9 F or more, then this could indeed be a problem. The only way to know if it is viral or you need an antibiotic is for the doctor to run some blood tests to see if your body is fighting off any illnesses. But also if you are on osteoporosis medications currently, the medication you are taking could be causing your symptoms. Osteoporosis medications like Raloxifene (Evista), alendronate (Fosomax), risendronate (Actonel) and ibandronate (Boniva) all can cause flu like symptoms in individuals that are taking them. I am not sure what medications you are on, but this could be your problem. If you do not think it is your medication, then you should see a doctor either way, they can do a complete blood work up to see if your body is fighting off any illnesses a right now and pinpoint whether it is viral or bacterial or medications. Goodluck
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Fever with joint pains is seen in viral fevers (especially Chickungunya), typhoid, SLE, rheumatoid arthritis, Polyarteritis nodosa (PAN) and other auto immune disorders. Localized infection of inflammation of joints can also cause fever and joint pains.
A cyclic pattern of fever is seen in EBV or infectious mononeucleosis, malaria, autoimmune disorders like rheumatoid arthritis, SLE, otitis media, endocarditis, IBS, STDs and cancers. You can go over all these possibilities to see what has not been tested for.
Please consult your PCP for primary examination followed by proper referral.
Take care!