Is this a common side effect of Fentanyl and Versed administered through IV for colonoscopy?

Yesterday afternoon I had a colonoscopy and was moderately sedated to a "twilight" state. I was given 100 mcg of Fentanyl and 6 mg Versed (according to my post-care sheet) through an IV. I feel fine, other than the fact that everything I drink or eat now tastes like chemicals. I have had other people taste the foods/ drinks and they have said they taste fine, so it is just me tasting it. I have never been sedated before for anything, so I don't know if this is normal or if it could have been cause by these drugs. Has anyone else experienced this?