Ian McCall has not fought since 2015 and has had to pull out of multiple fights because of health reasons and his opponents also have got injured and they had to reschedule the fight for later. McCall seems to have the worst luck out of anyone in the UFC when it comes to pulling out of the fight right before it happens because of bizarre illnesses.
McCall was able to make weight better than he usually does this time around, but for some reason he got violently ill to the point where he had to go to the hospital. He also mentioned that the UFC gave him an IV to use for precautionary reasons even though they are banned by USADA. Joe Rogan was quite surprised on his podcast when McCall had mentioned that.
On the next page, Ian McCall explains on Joe Rogan’s Podcast why the UFC gave him an IV and why it was alright.
(click on page #2 tab below to see the video of McCall talking about the UFC giving him an IV)