I have been a diabetic since 1994, more than half my life-time. Ever since being recognized with diabetes I have taken Humulin N and Humulin R twice a day. I use syringes to mix the appropriate dosage of these insulins and then inject them. As I have found out today Shoppers Drug Mart stopped carrying Humulin N and R in 10ml vials, they carry them in cartridges so they can charge twice as much for the Humulin and charge for special injection pens and needles. On top this form of injection does not allow the user to mix two types of Humulin, I would have to make four injections per day instead of two and therefore spend more money. I have bought Insulin from Shoppers Drug Mart in the past and spend around $100/month for my medication. Apparently they want me to pay more. I had to go to three separate Shoppers Drug Mart locations before finding one that had Humulin in vials. There are no other pharmacies in my neighborhood. This is a case of medical negligence because they never warned me about changes in the medication they carry. Shoppers Drug Mart carried this medication in 10ml vial for over 20 years, recently they changed the format of injection of this medication so that they can make more money without warning patients who rely on this medication twice and up to four times a day.