Ozempic comes in three pen strengths: 2 mg, 4 mg, and 8 mg of semaglutide per pen. Each pen contains enough medication for four weeks of injections, but the weekly dose you actually inject depends on which pen you’re using. The weekly doses range from 0.25 mg up to a maximum of 2 mg.
The Three Ozempic Pen Options
Every Ozempic pen holds 3 mL of liquid, but the concentration of semaglutide inside differs. Here’s how each pen breaks down:
- 2 mg pen (2 mg/3 mL): This is the starter pen. It delivers either four weekly doses of 0.25 mg plus two weekly doses of 0.5 mg, or four weekly doses of 0.5 mg. The pen has a dial that lets you select the correct dose for each injection.
- 4 mg pen (4 mg/3 mL): Delivers four weekly doses of 1 mg each.
- 8 mg pen (8 mg/3 mL): Delivers four weekly doses of 2 mg each, the maximum approved dose.
Each pen lasts roughly one month. You inject once per week on the same day, at any time of day, with or without food.
How the Doses Build Over Time
You don’t start at a full therapeutic dose. The 0.25 mg starting dose isn’t actually meant to treat anything. It exists solely to let your body adjust to the medication and reduce side effects like nausea. You stay at 0.25 mg for four weeks, then move up to 0.5 mg.
From there, the schedule depends on how well the medication is working for you. The three maintenance doses are 0.5 mg, 1 mg, and 2 mg per week. Your prescriber will increase the dose based on your blood sugar response, typically in steps with at least four weeks between each increase. The 2 mg weekly dose is the FDA-approved maximum.
This gradual approach means you’ll move through different pens over the first several months. You’ll start with the 2 mg pen (for the 0.25 mg and 0.5 mg doses), potentially move to the 4 mg pen (for 1 mg doses), and possibly end up on the 8 mg pen (for 2 mg doses) if needed.
How the Pen Dial Works
Each pen has a dose selector that you turn until the display shows your prescribed dose. The pen is pre-set to only allow the doses it was designed for. You should not try to “count clicks” on the dial to create custom doses between the labeled amounts. Health authorities have flagged this practice as dangerous, with reports of adverse events from people attempting it.
Ozempic vs. Wegovy Strengths
If you’ve heard about Wegovy, it uses the exact same active ingredient, semaglutide, but is approved specifically for weight management rather than type 2 diabetes. The key difference is that Wegovy goes up to 2.4 mg per week, slightly higher than Ozempic’s 2 mg maximum. This matters because people sometimes assume the two medications are interchangeable at the same doses, but they have different pen configurations and titration schedules.
Storage After Opening
An unopened Ozempic pen stays in the refrigerator. Once you’ve used it for the first time, you can keep it either refrigerated (36°F to 46°F) or at room temperature (59°F to 86°F). An opened pen stays good for up to 56 days, which comfortably covers the four weeks of doses inside it, plus a buffer if you start the pen a few days late.
After 56 days from first use, discard the pen even if medication remains inside.
What to Do if You Miss a Dose
If you miss your weekly injection, you have a five-day window to take it late. If more than five days have passed since your missed dose, skip it entirely and resume your normal schedule the following week. Do not double up to make up for a missed injection.