Phlox: I think I can help you, Ensign, but it would mean going into Mister Reed's medical record. That information is confidential.
Phlox: Under the circumstances, I suppose it wouldn't hurt. I've made it a point to study each crewman's medical history, and i remember noticing that Lieutenant Reed suffers from a number of allergies. Lets see, dust mites, oak pollen, tropical grasses. Ah ha, here it is. He's averse to various plant enzymes, including bromalin.
Phlox: Over the last several years he's been taking regular injections so that his body can tolerate bromalin.