Ozempic (Semaglutide) Guide
Mechanism, Dosage, Clinical Data & Tracking Protocol
Ozempic (semaglutide 0.5–2 mg) is a once-weekly GLP-1 receptor agonist FDA-approved for type 2 diabetes. Its SUSTAIN trial program demonstrated consistent HbA1c reduction and significant weight loss, making it one of the most-prescribed GLP-1 medications worldwide. Track every dose, side effect, and outcome in Shotlee.
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What Is Ozempic?
Ozempic is the brand name for semaglutide — a glucagon-like peptide-1 (GLP-1) receptor agonist administered as a once-weekly subcutaneous injection. Developed by Novo Nordisk, it was FDA-approved in December 2017 for glycaemic control in adults with type 2 diabetes. The same molecule at higher doses is marketed as Wegovy for chronic weight management.
GLP-1 is an incretin hormone naturally released by intestinal cells after eating. Semaglutide mimics GLP-1 but has a half-life of approximately 7 days (vs. minutes for native GLP-1) due to its fatty acid chain and albumin binding, making once-weekly dosing effective. It reduces appetite via hypothalamic receptors, slows gastric emptying, and stimulates glucose-dependent insulin secretion.
Ozempic vs Wegovy vs Rybelsus
All three are semaglutide. Ozempic (0.5–2 mg injectable) is approved for type 2 diabetes. Wegovy (2.4 mg injectable) is approved for obesity. Rybelsus (3–14 mg oral) is approved for type 2 diabetes. Track whichever formulation your prescriber uses in Shotlee.
Ozempic Dose Escalation Schedule
0.25 mg
Weeks 1–4
Starter dose — not therapeutic. Allows GI tolerance to develop before escalation.
0.5 mg
Weeks 5–8+
First maintenance dose. Many patients achieve target HbA1c reduction at this level.
1 mg
Week 9+ if needed
Escalate if 0.5 mg is not meeting glycaemic targets after at least 4 weeks.
2 mg
Week 13+ if needed
Maximum approved dose. Approved in 2022; provides additional HbA1c and weight reduction.
How Semaglutide Works
Binds GLP-1 receptors in the pancreas → stimulates glucose-dependent insulin secretion
Suppresses glucagon secretion → reduces hepatic glucose output
Acts on hypothalamic appetite centres → reduces hunger and caloric intake
Slows gastric emptying → blunts post-meal glucose spikes and prolongs satiety
SUSTAIN Trial Highlights
HbA1c reduction (SUSTAIN-6)
−1.5%
Mean HbA1c reduction vs placebo at 104 weeks in high cardiovascular risk patients.
Weight loss (1 mg dose)
−6.1 kg
Mean weight loss at 56 weeks vs −1.9 kg placebo in SUSTAIN-1.
CV event reduction
−26%
Relative risk reduction for MACE (CV death, non-fatal MI, non-fatal stroke) in SUSTAIN-6.
SUSTAIN Program: Key Endpoints
| Trial | Comparator | HbA1c Change | Weight Change | Duration |
|---|---|---|---|---|
| SUSTAIN-1 | Placebo | −1.5% (1 mg) | −6.1 kg | 30 weeks |
| SUSTAIN-2 | Sitagliptin | −1.5% (1 mg) | −4.3 kg | 56 weeks |
| SUSTAIN-3 | Exenatide ER | −1.5% (1 mg) | −5.6 kg | 56 weeks |
| SUSTAIN-6 | Placebo | −1.1% (1 mg) | −3.6 kg | 104 weeks |
| SUSTAIN-7 | Dulaglutide | −1.5% (1 mg) | −5.8 kg | 40 weeks |
Source: Ozempic full prescribing information and SUSTAIN program publications. All values are mean changes from baseline vs active comparator or placebo. [1,2]
How to Inject Ozempic
Choose a site: abdomen (at least 2 inches from navel), thigh, or upper arm. Rotate sites weekly.
Clean the skin with an alcohol swab and allow to dry for 10–15 seconds.
Remove the cap, prime the pen if it is a new one (until a drop appears at the needle tip).
Pinch the skin, insert at 90°, press and hold for 6 seconds, then withdraw. Apply gentle pressure — do not rub.
Log the injection in Shotlee: date, dose, site, any immediate reactions.
Common Side Effects & Management
Nausea
Vomiting
Diarrhoea / Constipation
Injection Site Reactions
Headache / Fatigue
Rare: Pancreatitis
Track Your Ozempic Protocol in Shotlee
Systematic tracking gives your prescriber the data to make better dose decisions.
Dose & Injection Logs
Record date, dose, and injection site every week. Build a complete dose history.
Weekly Weight
Log weight each week (same time, same conditions). See your trend curve, not just single data points.
Blood Sugar & HbA1c
Record fasting glucose readings and HbA1c from lab visits to track glycaemic progress.
GI Side Effects
Rate nausea severity 1–10 and log timing post-injection. Reveals dose-related patterns.
Concomitant Medications
Log all other medications, including metformin, insulin, or blood pressure drugs for interaction awareness.
Lab Snapshots
Upload lipid panels, LFTs, and kidney function results over time to spot metabolic improvements.
Guide FAQs
Blood sugar improvements begin within days of the first dose. Meaningful HbA1c reduction is typically seen by 12 weeks. Weight loss effects accumulate over 3–6 months. The 0.25 mg starter dose is sub-therapeutic — effects build after escalation to 0.5 mg and above.
Ozempic is FDA-approved for type 2 diabetes only. Wegovy (semaglutide 2.4 mg) is FDA-approved for chronic weight management. Some prescribers prescribe Ozempic off-label for obesity. For FDA-approved weight loss treatment, ask your prescriber about Wegovy. Track either in Shotlee.
Take the missed dose as soon as you remember, provided the next scheduled dose is at least 2 days away. If the next dose is within 2 days, skip the missed dose and resume the regular schedule. Never take two doses in the same week.
Rapid weight loss from any cause can include lean mass loss. Studies show semaglutide users lose approximately 25–40% of lost weight as lean mass, similar to other methods. High protein intake (≥1.2 g/kg body weight) and resistance training are the primary mitigation strategies. Track both weight and measurements in Shotlee to distinguish fat vs mass changes.
Unopened pens: refrigerate at 2–8°C until the expiry date. In-use pen: store at room temperature (below 30°C) or refrigerate for up to 56 days. Never freeze. Protect from light. A travel case with a cool pack is recommended for trips over 30°C.
References
Track Your Ozempic Protocol in Shotlee
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