Diazepam
"20 months ago strained lower back doing commercial door contract in addition to world training for a swimming comp, slight strain combined with underwater dolphin sprints with fins on wouldn't allow my damaged/strained lower back muscles to heal, inturn they became more and more tense and sore until spasms began and finally a massive spasm floored me.
Doc gave me a course of 6 Diazepam, I think 5mg, 1 every evening so as not to feel drowsy during the day. These combined with a stop to my training and the spasms stopped almost that day and allowed my back to heal.
Due to work back on them, I'm confident they will work but I do find after four days or so that of an evening they make me feel euphoric. This drug helps me to function pain free"