Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice.
Ciprolflaxacin (though can potentially cause
tendinitis), however the pain you said should not be caused by cipro, neither it should last this much after stopping the drug. So I don't think it would be the drug causing it. Similarly this much diffused pain and the site of the pain is not typical for a blood clot, so again its probably not any clot. However in context of
polycythemia there can be so many reason that can give you pain, like if HB is very high, raised uric acid ,or any infection, raised or low calcium. Or mechanical pain. So I would advise you should go to your doctor , and get fresh test , including HB level,
TSH, CBC , X-ray, uric acid, etc to know what could be the cause of the pain , your doctor may better advise what tests you need after he examines you. You can use regular
Paracetamol for the pain till that.
Hope I have answered your query. Let me know if I can assist you further.