I was on Tymlos. It doesn't require refrigeration like Forteo. I kept the pen on my nightstand along with a box of needles.

I've had plenty of needles from getting blood tests, but I never had to use one on myself. The needles screw onto the pen. They are very thin and short. I learned how to rest the needle on the skin and let it naturally go in, rather than me pushing it in. You hold it for 10 seconds, then quickly take it straight out and dispose of it (carefully - they are sharp like a cat's claw.)