Steroid nasal spray
Make sure you use it right,directed away from the midline,towards ear inside the nasal cavity
,don't exceed prescribed dose,that way you avoid side effects,usually dryness of the nasal septum and probably nose bleeds
, helps if you irrigate nasal cavity with saline prior to use.
Other side effects are rare,some are serious, others aren't,usually with long term medically unsupervised use, good luck