Who wants my alien medi-gel formula?

While raiding a Cerberus base, I came across a medi-gel formula that they ignored because it doesn't help humans. My mission log tells me someone on the Citadel will be interested, so when the mission was over I flew right back and ran around the Citadel looking for the interested party, even triple-checking the Hospital, and can't find anyone who wants it.

Who do I give the alien medi-gel formula to?

Solution 1:

A human doctor will be looking for the medi-gel formula you have in your possession following the completion of your mission on Palaven. You can find her in lobby of the Huerta Memorial Hospital on the Citadel, to your left when you walk in the door:

Outside of having completed the Palaven mission, there's nothing in particular that you need to do to trigger this mission beyond talking to her once in possession of the forumla. As Raven Dreamer notes in the comments, the doctor does have a side-conversation that would clue you into her need for the formula to begin with which you'll overheard as you approach her.

Solution 2:

When I first came to the hospital after getting the formula, she was not here. But she was after I did a mission (Palaven).