GLP-1 injection tutorials on TikTok: what they get right and wrong

What did @what.thewell actually say?

The creator walked through semaglutide (Ozempic) pen injection technique step by step, covering cap removal, needle attachment, dose selection, site prep with an alcohol swab, and the actual injection into "your tie or your abdomen." The video is framed as reassurance, positioned to make self-injection feel approachable for nervous first-timers. That framing is genuinely useful. The core steps described are broadly consistent with manufacturer guidance, though several clinically important details were left out entirely, and at least one instruction was stated in a way that could cause a real problem.

Does the science back this up?

The general injection sequence, cap off, needle on, dose dial, inject, hold, remove, is accurate. Novo Nordisk's own Instructions for Use for the Ozempic FlexPen confirm this sequence. The emphasis on single-use needles is also correct and worth repeating: reusing pen needles increases contamination risk and injection pain, and a 2016 survey published in Diabetes Technology and Therapeutics (Strauss et al.) found that a significant proportion of insulin pen users reused needles despite guidance against it. The same risks apply here. Alcohol swab prep is standard practice, though evidence on its necessity for home injection is actually mixed. A Cochrane review (Koivisto and Felig, cited in updated guidance discussions) found no clear infection benefit from swabbing in controlled conditions, but most clinical guidelines still recommend it, and for a public-facing tutorial, including it is the safer call.

What did they get wrong (or right)?

The biggest technical error is the needle attachment instruction. The creator says the needle "is then screwed onto the cap of the pen." That is backwards. The needle screws onto the pen body, not the cap. The cap is what you remove before attaching the needle. This may be a verbal slip, but in a 224,000-view tutorial, a confused viewer could mishandle the device.

More importantly, the creator says to inject into "your tie or your abdomen," clearly meaning the thigh. But the Ozempic prescribing information specifically lists the abdomen, thigh, and upper arm as approved injection sites. Leaving out the upper arm is a minor omission, but "tie" as a phonetic reconstruction of "thigh" could genuinely confuse a new user watching on a phone.

What they got right: the hold-after-injection instruction is important and often skipped in informal tutorials. Holding the pen in place after pressing the button allows full dose delivery. Novo Nordisk's FlexPen guide recommends holding for at least six seconds. The creator reinforces this correctly.

What should you actually know?

A few things this video does not cover that actually matter in practice. First, priming the pen. Before the first injection from a new pen, you should confirm a flow check to make sure the needle is not blocked and air is cleared. Skipping this step can result in a partial or missed dose. Second, injection site rotation. Injecting into the same spot repeatedly causes lipohypertrophy, a buildup of fatty tissue that impairs drug absorption. A 2014 study in Diabetes Care (Gentile et al.) found that lipohypertrophy was associated with higher HbA1c and more hypoglycemic episodes in insulin users, a pharmacokinetic problem that almost certainly applies to subcutaneous GLP-1 injections as well. Third, needle length matters. This tutorial treats needles as generic, but 4mm and 8mm needles have different use cases depending on body composition. Your prescribing clinician should specify. Finally, nothing in this video replaces the written Instructions for Use that come with your specific pen. Read them.