nothing else is on it. it' not hydromorphone. the imprint is not necessarily the letter K, it is not defined well at all. the upper right hand arm of the K is bigger than the rest. or maybe i'm looking at it upside down???
round yello unscored with a K with an arrow in the upper arm is Aspirin, ASA Enteric Coated Tablets (Tab 81 mg)
Rugby Laboratories Division of Watson Pharmaceuticals
an image can be found at http://www2.eckerd.com//RxAdvisor/sh...e=Aspirin,*ASA