In this graph you can see how much longer it took to for Sudafed to dissolve compared to the Benedryl and Tylenol with the simulated stomach acid. From this graph it shows that Benedryl took the least amount of time to dissolve. Sudafed took the longest out of all three (around 10 to 13 minutes), Tylenol, second longest (around 5 to 7 minutes), and Benedryl, with the least amount of time ( around 3 minutes each).

In this graph you can see, also, how long it took for Sudafed to dissolve in the water test. The Benedryl also took the least and Tylenol in the middle. The water tests took less time to dissolve each tablet than the acid. The Sudafed took around 7 minutes, Tylenol