I, too, have had constipation problems and have tried OTC products like MiraLax, etc. The result has been that I can't leave the house because of frequent lose stools. I, too, have had a colonoscopy. My gastro doctor now has me trying Align, probiotic, and Culturelle Complete IBS Support System. You can get both at Walgreens. Pre-COVID, I had IBS -D for years. Now, it's the opposite. I have read recently that GI problems have been identified as a Post COVID symptom. Oh, joy!!
Lucy