Can you take cold flu remedies the day before a colonoscopy?

It is best to contact the office of the physician who will do the colonoscopy to ask about that. Do this as soon as possible before the scheduled procedure because sometimes the procedure will need to be delayed until an infectious illness is resolved. You also need their advice about what remedies would be appropriate, since you cannot use some medications before this type of procedure, such as aspirin that may increase bleeding. You can usually ask the office nurse for this information.