An experimental drug that increases blood flow to damaged tissue, used by Julian Bashir to keep Vedek Bareil functioning during peace talks with Cardassia despite serious risk to his organs.
Vasokin appears in the Deep Space Nine episode Life Support. Vedek Bareil is badly hurt in a shuttle accident on the way to negotiations with Cardassia, and Kai Winn insists she cannot conclude the treaty without his advice.
Bashir explains that vasokin would let Bareil stay conscious and working by boosting circulation, but that in a significant share of patients it causes severe damage to the internal organs. Bareil chooses to take it. The drug does its work and does its harm: his organs begin to fail and Bashir has to replace them with artificial ones.
The treatment eventually damages his brain as well. After half of it has been replaced with positronic implants, Bashir refuses to go further and lets Bareil die, shortly after the Bajoran-Cardassian treaty is signed.