Semaglutide storage after reconstitution — 28-day stability data

Dr.AddMedPHL said:

Albumin binding above 99% is the whole reason weekly dosing works, and it is also why the trough matters more than the peak.

Bookmarking. The distinction being drawn above is the one nobody else makes. I will report back once I have actually tried it.

Adding the clinical framing, because it changes how the question reads.

Storage best practices for compounded storage and cold:

• Unreconstituted lyophilized powder: refrigerate (36-46°F), good for 12+ months
• Reconstituted vials: refrigerate, use within 28 days
• Pre-filled pens: refrigerate until first use, then room temp OK for 28 days
• Never freeze reconstituted peptides — ice crystals damage the protein
• Protect from light — store in original box or wrap in foil

When in doubt, refrigerate. Temperature abuse is the #1 cause of reduced potency in compounded peptides.

JenPlateau said:

Steady state is the thing most people miss.

Filing a mild objection. Mild because I might be wrong; an objection because nobody has addressed the case that does not fit. The trial means are being read too generously in this thread. STEP populations were selected, supported, and titrated by protocol, and the real-world curves are consistently a few points worse. That difference is not noise, it is what happens when you remove the study infrastructure.

CarlaRPh_TPA said:

The distinction that matters is unopened versus in use.

Storage question about storage and cold: my pen was left out of the fridge for 8 hours. Is it still good?

Per the manufacturer, both Ozempic and Wegovy pens can be stored at room temp (up to 86°F) for up to 28 days after first use. So yes, it should be fine as long as it wasn't exposed to extreme heat.

Moderator note: a couple of off-topic posts removed.