🍪 CompoundTalk uses cookies to improve your experience, analyze traffic, and personalize content. By continuing to use this site, you agree to our Cookie Policy.
Evidence-based GLP-1 & peptide discussion since 2023
ForumsSemaglutide (Ozempic / Wegovy)Semaglutide pharmacokinetics — half-life, Tmax, steady state modeling Page 2

Semaglutide pharmacokinetics — half-life, Tmax, steady state modeling

SarahChen_PharmD Fri, Mar 13, 2026 at 5:15 AM 10 replies 213 viewsPage 2 of 2
laura_annarbor
Member
189
890
Dec 2024
Ann Arbor, MI
Mar 13, 2026 at 8:05 AM#6
Previously posted:
Weeks 1-4 (0.25mg): This is your "get used to it" phase. Honestly, at this dose most people feel very little.

This is so helpful, thank you!! Quick question — does it matter what time of day you inject? My doctor said once a week but didn't specify morning vs evening. I've seen some people say evening is better for managing nausea because you sleep through the worst of it?

38 23labquiet_amy, emily_PDX, Dr.SleepRoch and 35 others
Reply Quote Save Share Report
kate.chem
VIP Member
3,890
17,654
Dec 2023
California
Mar 13, 2026 at 8:22 AM#7

I do mine Saturday mornings so if I feel crappy I have the weekend to deal with it. Some people swear by evening injections so you sleep through the initial nausea wave. Honestly, semaglutide has a half-life of about 168 hours (a full week), so the drug levels stay pretty stable — the nausea isn't really about peak levels, it's more of an initial GI adjustment thing.

Just pick a day and time that works for you and stay consistent. The most important thing is not missing doses.

Last edited: Mar 13, 2026 at 11:22 AM
31 23VanRx_Mike, steve_okc, dave_SLC and 28 others
Reply Quote Save Share Report
FranDenver
Member
267
1,123
Oct 2024
Denver, CO
Mar 13, 2026 at 8:39 AM#8

ngl I was expecting way worse based on TikTok horror stories. My first month on 0.25 I had literally zero side effects. Like nothing. I actually called my pharmacy to make sure I got the real stuff lmao

It wasn't until 1.0 that I really felt it kick in. So don't panic if the first month feels like nothing is happening.

18 24BariatricNurseD, MASHdoc_SA, GenomicsKate and 15 others
Reply Quote Save Share Report

Sigma-Aldrich — Research-Grade Standards

Certified reference materials, analytical reagents, and research-grade standards for peptide verification. Trusted by laboratories worldwide.

Shop Reference Standards
FDA_TrackerJim
Senior Member
1,567
7,890
Feb 2024
Rockville, MD
Mar 13, 2026 at 8:56 AM#9

Since we're talking expectations, here's a rough timeline of what the STEP trials showed for average weight loss at each phase. Keep in mind these are AVERAGES — individual results vary wildly:

TimepointDoseAvg Weight Loss (% body weight)Notes
Week 40.25mg~1.5%Sub-therapeutic dose
Week 80.5mg~3.5%Appetite effects begin
Week 161.0-1.7mg~7-8%Significant reduction in food noise
Week 282.4mg~10-12%Nearing plateau for many
Week 682.4mg~14.9%STEP 1 endpoint

So for the OP at 224lbs, a "typical" STEP-1-like result would be roughly 33lbs over 68 weeks. But there's huge variance — about a third of participants lost >20% body weight.[1]

Last edited: Mar 13, 2026 at 11:56 AM
42 15Dr.LeslieOBGYN, MikeNYC_runner and 39 others
Reply Quote Save Share Report
Dr.EndoIndy
Member
267
1,234
Oct 2024
Indianapolis, IN
Mar 13, 2026 at 9:13 AM#10

You guys are amazing. I feel so much more prepared now. I'm going to do my first injection Saturday morning, have ginger candies ready, fiber supplements on order, and a big water bottle charged up.

I'll report back next week with how it goes. Wish me luck! 🤞

30 24SandraNC_45, Dr.EndoIndy, tom_AK and 27 others
Reply Quote Save Share Report

Similar Threads

STEP 1-5 trials comprehensive summary — efficacy endpoints compiled12 replies
Oral semaglutide 50mg Phase 3 — OASIS program results16 replies
Compounded semaglutide stability data — temperature and light sensitivity16 replies
0.25mg → 2.4mg titration: optimal schedule based on clinical data6 replies
Semaglutide and GFR improvement — FLOW trial renal endpoints15 replies
ForumsNewTrendingMembersAccount

Log In

Forgot password?
No account? Register