How to Inject Ozempic
Ozempic (semaglutide) comes as a prefilled, disposable pen for subcutaneous injection once weekly. Choose an injection site like the abdomen (at least 2 inches from the navel), thigh (front or outer area), or upper arm. Clean the site with an alcohol swab. Remove the pen cap, check the liquid is clear and colorless, dial the dose (starting at 0.25 mg), insert the needle at a 90-degree angle, press the button fully until it clicks, hold for 6 seconds, then remove. Never reuse needles or share pens. Rotate sites weekly to avoid irritation.[1][2]
Starting Dose and How to Increase It
Begin with 0.25 mg once weekly for 4 weeks to minimize side effects like nausea. Your doctor may then increase to 0.5 mg weekly. If needed for better blood sugar control, go to 1 mg weekly after at least 4 weeks on 0.5 mg. Maximum is 2 mg weekly. Inject on the same day each week, with or without food, and you can change the day if at least 48 hours pass between doses.[1][2]
Storage and Handling Before First Use
Keep new pens in the refrigerator at 36-46°F (2-8°C) until the expiration date. Do not freeze. Once opened or used, store at room temperature up to 86°F (30°C) or refrigerated for up to 56 days. Discard after 56 days even if liquid remains. Keep away from heat, light, and out of reach of children.[1][2]
What If You Miss a Dose
Take it within 5 days. If more than 5 days have passed, skip and resume your regular schedule. Do not double up.[1][2]
Common Mistakes and How to Avoid Them
Do not shake the pen—gently roll if needed. Prime the pen (dial 2 units and inject into the air) before first use and if no liquid came out last time. Use a new needle each time. If the dose selector returns to 0 without clicking, it may not have delivered fully—do not inject more, just track it and call your doctor. Pens are single-patient use only.[1][2]
Side Effects Patients Report Most
Nausea, vomiting, diarrhea, abdominal pain, and constipation affect up to 20% initially but often improve. Serious risks include pancreatitis, gallbladder issues, low blood sugar (especially with insulin), kidney problems, and thyroid tumors (boxed warning). Stop and seek help for severe stomach pain, vision changes, or allergic reactions. Weight loss is common but monitor for excessive loss.[1][2]
Who Should Not Use Ozempic
Avoid if you have personal/family history of medullary thyroid carcinoma, multiple endocrine neoplasia syndrome type 2, or severe kidney disease. Not for type 1 diabetes or diabetic ketoacidosis. Use caution if pregnant, breastfeeding, or planning pregnancy—stop at least 2 months before.[1][2]
Ozempic vs. Other GLP-1 Drugs Like Wegovy or Trulicity
Ozempic is approved for type 2 diabetes and cardiovascular risk reduction; Wegovy (same drug, higher doses) is for weight loss. Trulicity (dulaglutide) is weekly like Ozempic but may cause less GI upset for some. All slow gastric emptying and suppress appetite, but Ozempic has stronger heart protection data.[1][3]
Sources
[1]: Ozempic Prescribing Information (Novo Nordisk)
[2]: FDA Ozempic Label
[3]: Drugs.com Ozempic Comparisons