# HalfLytely vs Phospho-Soda

**URL:** <https://boards.straightdope.com/t/halflytely-vs-phospho-soda/484288>\
**Category:** Factual Questions\
**Created:** [February 3, 2009, 6:40pm UTC](https://boards.straightdope.com/t/halflytely-vs-phospho-soda/484288 "2009-02-03T18:40:44Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![crazyjoe](https://avatars.discourse-cdn.com/v4/letter/c/f14d63/32.png) [@crazyjoe](https://boards.straightdope.com/u/crazyjoe)\
**Post date:** [February 3, 2009, 6:40pm UTC](https://boards.straightdope.com/t/halflytely-vs-phospho-soda/484288/1 "2009-02-03T18:40:44Z")

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So, yay, I get to have a colonoscopy next week. In the past, the doc has always told me to prep with phospho-soda and clear liquids. That doc retired, so I have a new doc and he gave me a prescription for Halflytely + some tablets.

My question is, what’s the difference between the two treatments? Is one of them “easier” on your bowels than another, or does one do less to exacerbate certain conditions?

I have Ulcerative Colitis, and am suffering from some flare-ups, which is why the colonoscopy.

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**Author:** ![crazyjoe](https://avatars.discourse-cdn.com/v4/letter/c/f14d63/32.png) [@crazyjoe](https://boards.straightdope.com/u/crazyjoe)\
**Post date:** [February 4, 2009, 2:40am UTC](https://boards.straightdope.com/t/halflytely-vs-phospho-soda/484288/2 "2009-02-04T02:40:28Z")

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one bump.