Hello. Welcome to hcm.
While doing colonoscopy
,some times vagus nerve
might get stilulated which can cause sudden decrease in heart rate
. Then we normally monitor the patient till the patient is asymptomatic. So your doctor gave u oxygen
so that your heart wil not suffer from low oxygen but here,you are getting irritation of nose and throat due to oxygen,which is common for some patients.
So if you dont have any symptoms and heart rate is normal,you can remove the oxygen n drink lots of fluid. Slowly,in a day or two,you wil be fine. No need for antibiotics.
All the best