Can I Continue Taking Montelukast, Zyrtec HTC, And Spironolactone Before My Colonoscopy?

I m scheduled for a colonoscopy this coming Friday (7 days away including today). My doctor hasn t contacted me with updated instructions or sent a pamphlet yet. I got most of the basic instructions over the phone. Can I continue taking hormone medication & allergy medication? (montelukast, zyrtec htc, spironolactone) I m allergic to everything that s on a standard blood allergy test + environmental (no joke).