Pepto Bismol was my best friend for years..lol... It was very effective for me. I always took the caplets though, because I couldn't get the liquid down for anything... The cherry flavored chewables are decent, but still not "good".... But, it never constipated me, and I often took 10 or so per day. It worked for me. But, as with all medicine, some works well for certain people and may be horrible for the next.I've found that Pepto gives me immediate relief, but Immodium is longer lasting.With pepto, you can take up to 16 in one day and immodium, you're only supposed to take 4. So, I usually take 2-3 immodium first, then 2-3 pepto. Cuz the pepto doesn't last very long for me, but it works fast. So, the pepto gives me immediate relief and by the time it wears off, immodium has kicked in.I'll always remember the first time I took it though. I was in like, 11th grade, and wasn't aware that it turns your stools black and I thought for sure I was dying.... lol... Now it really doesn't do it to me though, unless I take a lot.... which is rare.