Hi again, sharmeen, and thanks for this post and question - it's a good one. You may be aware we cannot provide medical advice or diagnostics over the internet (for your own safety), but your concern certainly warrants a reply.
In the most general of terms, the medication, Uniphyllin, belongs to the classification of theophylline-type medicines and, typically are not associated with thrush, as a side effect.
However, to be absolutely certain for yourself, you may want to discuss this further with your prescribing physician and/or your dispensing pharmacist.
Have you had this medication (Uniphyllin), prescribed for your own use?
What do you think?
Leon (site moderator asthma.net)