Hi Rajiv Nayan,
Thank you for your query on Healthcare Magic.
The drugs which are the child receiving at present unlikely to cause a fever
on and off of approximately a duration of 2 months.
The cause for his fever to be evaluated extensively with related blood and urine examination.
Even though there is an entity there such as drug fever in which the drugs may be the cause for fever but it is an exclusion of the diagnosis means after ruling out all infections and metabolic reasons for fever, then we can come to this type of problem.
I advise you to make a temperature chart of this child over a period and consult the doctor for the analysis of this pattern so that he can advise you further evaluation depending on his review and physical examination.
This type of fever is known as Pyrexia of unknown origin and requires some time to come to a conclusion.
So be in regular follow up with the pediatrician
and if your still concerned go for a second opinion
. Continue his medication as per the doctor prescription.
Hope I have answered your query.