I am scheduled for a endoscopy and the next day a hida scan.i was told not to take any meds 24 hrs befor hida. will the endoscopy be ok to have first?

Probably, but...: You were given very specific instructions to avoid medications 24 hours before your biliary scan. If you are planning to have your endoscopy less than 24 hours before the hida, please alert your anesthesiologist to avoid endoscopic sedatives that might alter gallbladder ; bile duct motility. If these drugs cannot be avoided, then reschedule to ensure your test(s)' best/most accurate result(s).

Opioids ...: Taking opioid pain medications, particarly morphine can cause contraction of the sphincter of oddi and thus false positive result for common bile duct obstruction on hida. You also want to avoid eating 4-6 hours prior to hida scan and avoid fasting more than 24 hours before scan since this can cause false positive for cystic duct obstruction (acute cholecystitis).

Possibly: Anesthesia and pain medications can interfere with gall bladder test.