Insulin Pen Needles and Syringes - What You Need to Know

It is necessary for insulin users to hold a meter together with glucose tablets all the time. Insulin can trigger "lows" which lead to unconsciousness if possibly not treated promptly. Insulin users also have to test more normally than non-insulin clients.

Source: http://pen-needles29.tumblr.com/post/9527850553/why-are-insulin-infusion-injection-sets-so-important

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