Long delivery south to LA with the owner along, a good companion. A day and a half out, he developed severe lower abdominal pain which increased until he couldn't move. Called the Coast Guard from offshore and got patched to a surgeon, among whose questions were: inability to urinate? Correct. Has he taken Bonine? Yes.
Advised to head for the nearest port (air evac unnecessary), we crossed into the Columbia River to find a doctor in Astoria. After treatment, full recovery to pain-free state took several days. The takeaway: read seasickness drug warnings and take them seriously. Most have cautions about using if urinary problems exist. My local pharmacist adds, stay within the prescribed dosage.