Our expert says:
An allergy to medication like Doxycycline should not persist so long as 3 weeks. There is a possibility that the Doxycycline caused a Thrush (Candida) infection of the throat and gullet, and you need to have this infection treated. Prednisone could make the thrush infection worse and persist longer. Perhaps discuss this possibility with your GP.
The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal
advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.