Rotating between abdomen, thigh and upper arm: absorption differences — one year on

Worth separating two things that the opening post runs together.

One more thing on Rotating between abdomen that took me far too long to see: the two figures people quote are not measuring the same quantity. Once you notice that, the apparent contradiction disappears.

Source for the Rotating between abdomen figure, since it was asked for. It is in the discussion rather than the abstract, which is why the version circulating is stronger than the paper is.

Reading the surrounding paragraph is worth the two minutes. The authors are more careful than their summarisers.

Letting a refrigerated preparation come to room temperature before injecting reduces the sting for most people. It is not a stability requirement, it is a comfort one, and the two get confused.

If you have to inject at a different time of day than usual, that is a much smaller perturbation than it feels for a weekly compound with a week-long half-life.

The interesting part of this is the exception, and I do not understand the exception.

Injecting into an area that has become firm: lipohypertrophy — thickened fatty tissue from repeated injection in one area — changes local tissue absorption. Avoid injecting into areas that are noticeably firm or lumpy and allow those areas to recover for at least a few months.

The most useful reply I ever got about Rotating between abdomen was a request to state my units. It sounds like pedantry and it has saved me twice.

The number people quote for Rotating between abdomen is a central estimate presented without its interval, and the interval is wide enough that the estimate is nearly uninformative on its own.

Nothing in this subcategory is medical advice and none of it is a substitute for a demonstration from somebody qualified to give one, which most prescribers will do without being asked twice.

Bleeding at the injection site: normal and usually minimal. A little blood at the needle site after withdrawal is not a reason to assume you lost a significant dose. The needle passed through tissue and there is a small amount of bleeding in the tract.