As it's obvious this wasn't going to end nicely with those 2 guys waiting in bed in the core of my fortress, I waited for both of them to get in, then walled the entrance.
Next full moon came and both transformed ... and attacked each other, only one werelizard was still alive and transformed back.
Here's the last wereguy on his bed, next to the corpse of his former werefriend.
Now that was a nice hospital, functional and did good work in the course of that fortress life, so i wanted to get it back. But it was important to avoid having to order the kill to my soldiers, as the dwarves killing a werebeast that is a former fortress citizen can lead into
lots of dwarven fun.
I made system with doors controlled by lever (to stop the whole thing after effect) in order to provide water from the level above the hospital, well provide i mean fill the hospital with water in order to have the werelizard drowning, at least when he is in his dwarven shape.
Water came (i made sure to lock/pet impassable the doors so stupid citizen wouldn't try to get back into the flowing water in the corridor for some reason)
Werelizard thought it was a good idea to transform into beast shape to escape drowning
Just a question of time, and once forced to get back into his dwarf shape the werelizard finally drowned, goodbye and goodnight , victory.
Now time to remove all that water and get back my hospital