Lectrazine was a drug that was used to stabilize the cardiac and renal systems of humanoids. It could also be combined with hyronalin for temporary protection against radiation poisoning.
In the year 2378 Wesley Crusher used ten cc's of lectrazine on the wounded Colleen Cabot. It was part of the medkit that Jean-Luc Picard had on the Skegge. (TNG novel: A Time to Die)