Insulin syringes may vary in the amount of space between the bottom line and the needle (dead space), so if you are mixing two types of insulin be sure to discuss any change in the model and brand of syringe you are using with your health care provider. Novolin R can be mixed with NPH insulin right before use. When you are mixing Novolin R insulin with NPH insulin, always draw the Novolin R (clear) insulin into the syringe first. Add together the doses (total number of units) of NPH and Novolin R that you need to inject.
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My 14 year old has a building society account and bank account in his own name and although i had to sign forms to allow him to open them, he has his own bank card/payment book and gets statements sent to him, so I don't have anything to do with it. You can be 2 years old and have a savings account. All you have to do is have your social security card. You may have to have an adult/guardian sign for you though. I would say it depends on the bank, but I would guess that to have the account in your own name, you would likely need to be 18.