A holoprogram to deal with Pon farr
The Pon farr therapy program, although actually unnamed was written by USS Voyager's EMH to help Vulcans who are unable to "alleviate" symptoms of the Pon farr by other means.
Ensign Vorik was the first to try this therapy when he underwent his first Pon farr on Stardate 50537.2. The program was later adapted for Tuvok by Tom Paris, with a simulation of his wife T'Pel. (VOY: "Blood Fever", "Flesh and Blood")