I left my vial at room temp for a while - is it dead?

Short room temp trips are usually fine. Sustained heat is the problem, especially above 77 F for several hours. If it's Wegovy (semaglutide) in a pen, the published prescribing label permits up to 86 F for up to 28 days before the first use. If it's a research peptide in a plain vial with no stabilizers, be more conservative. A trip of a few hours under 77 F is generally okay. More than 8 hours of heat, direct sun, or a hot car - toss it.

• Wegovy (semaglutide) pen: prescribing label permits up to 86 F for up to 28 days before first use
• Research peptides in water: max 77 F; short trips under 2 to 4 hours at 68 to 77 F are tolerable
• Freeze-dried (unmixed) powder is more heat-tolerant than mixed solution
• Some peptides have heat-sensitive amino acids in their structure - check your peptide's specific guidance if you're unsure
• Avoid repeated freeze-thaw cycles with sensitive peptides

Your guided peptide companion.

PRTCL walks beginners through their first peptide with confidence - guided reconstitution, dose calculation, vial tracking, and answers to questions like this one. Built for first-timers, useful for everyone.

• · Guided walkthrough for your first dose
• · Dose calculator that does the math for you
• · Vial inventory and dose log tracking
• · Library of physician-vetted protocols

Free to start. Sign in if you already have an account.