Interfering with how the medicine is digested and absorbed by the body. For example, milk blocks iron absorption in the stomach. Calcium found in dairy products can bind some medications, such as iron supplements and some antibiotics (Cipro and Levaquin, a quinolone.)
Pros of elongated: much more comfortable for adults. I would definitely choose it for the master bathroom. Pros of round: easier for very young children to use due to the smaller opening in the seat. Also, there are code requirements of how much foot space you need in front of a toilet.
Elongated toilets come in standard height, comfort height, and ADA compliant. Many of our customers who have purchased these toilets wished they would have done it sooner. The cost difference between a standard height and comfort height / ADA compliant toilet is minimal. Our older customers love them, our tall customers love them, customers with bad knees love them, and women love them (after all, we have to sit every time)!