Magnesium sulfate / potassium sulfate / sodium sulfate
"Result:
*  Examining physician remarked at clarity of examination conditions

Taste:
*  Not great, but comparable to cough syrup - tolerable
*  By reference, I have paid good money (in my younger day) to drink more than a few shots of whiskey that were much tougher to swallow than this stuff..........

Experience post ingestion:
*  Began expelling within 20 minutes
*  Continued expelling roughly every hour to hour and a half through the night
*  Limited rest over night due to frequent expulsion, but for the positive results (see above), absolutely a tolerable down side tolerate

Conclusion:
*  Med was effective at delivering intended result in my case and well worth the noted challenges above to get the desired outcome."