I had been on librax for yes and not helping colon much saw a new gastro doctor wants me in. Linzess. First wanted me to weed down for two weeks before I started. I did in two day on linzess I went into some kind of allergic reaction. Hospital said I needed more time on librax . Now dr wants me to continue librax for 2 more weeks at night but still take linzess l have been only on it two days not enough time to give it a try. I'm afraid with a cruise in 4 days to do both and is it safe to do both