Q:  Quick question about insulin. I know that you're supposed to administer insulin Sub-Q (under the skin), but I have heard that people inject insulin IM (intramuscular) to affect onset times. I am taking Humalog and wanted to increase the reaction time. I have had some wicked episodes of hypoglycemia lately and I want it to kick in almost before I'm done eating. Will IM help? A: Well, normally I'd say that IM injections would take longer, but in the case of insulin, what happens is, there will be a more rapid onset. That's because there is more blood supply to muscles and more rapid absorption as a result. But the duration of insulin's impact will be vastly shortened using that method so take that into account on the backside. I actually recommend doing IM when you first start ...

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