Lantus vs. Levimir Question. Malachai is on 17units and is burning through vials. I've heard that a lot of people with Acro's prefer Levimir. Why is this? I know that some cats experience a sting with high doses of Lantus but if that isn't happening (yet), should I still switch? I happen to have a hookup where I can get Lantus vials pretty cheap. Mark's Pharmacy would cost me almost $200 every 5 weeks so I'm not sure I can afford that. Thoughts on this? ALSO, IF I were to TRY Levimir and not see any changes/improvements, could i switch back over to Lantus or will that mess up his system/depot? I'm not very educated on Levimir and how different it is from Lantus. Thanks!