I used biorinil for 5 days in a row because i had a severe sinusitis attack thanks to the suddlen weather change. i can't stop taking it... what to do?

Take for few days: Biorinil contains vaso-contritive medicine along with steroid, if it is helping you use it for few more days , but cause ( sinusitis ) has to be addressed for cure .see your ENT specialist for examination , treatment including drainage of sinuses .

Chronic congestion: Long-term use of a topical vasoconstrictive medication can cause dependence, hypertension, rebound congestion. I know you have chronic sinusitis and are under care of an ENT. You may not be able to stop suddenly but begin to switch to nasal saline spray and have a warm humidifier by your bed to keep nasal mucosa shrunken. Over 3-5 days you should be off Biorinil completely.