Hello, My Husband Is Here With Me, He Has Been

Hello, my husband is here with me, he has been ill for a very long time bed fast at home. He was put on I.V. Antibiotics 3 months ago approximately. He is trying to remember what the names were of meds, he was taking before the I.V. antibiotics . there were two different ones. One was white we think that’s sulfamethoxazole TMP-DS .THE Other one was mixed into the same bottle ..not sure how but his eyesight was bad before we got him glasses, so we aren’t sure about the pink which are the same size and just want to remember the name.he is on Medicare and sees different drs some times so care is not always consistent.He has been a cancer patient and fighting infection of the bones in his spine . The pink pill had letters L and U on one side and 30X on the other side but the 3 was turned the other direction. Can you help?