An Ozempic pen lasts for 4 weekly doses, regardless of which pen size you’re prescribed. Once opened (or exposed to room temperature), the pen must be used or discarded within 56 days. Those two timelines, doses and shelf life, work together to determine how long your pen stays usable.
How Many Doses Are in Each Pen
Every Ozempic pen contains exactly 4 weekly injections at its labeled dose. That means a single pen covers about one month of treatment. Here’s what each pen contains:
- 0.25 mg / 0.5 mg pen (red label): Contains 2 mg total. Delivers 4 doses of 0.25 mg and 2 doses of 0.5 mg, or 4 doses of 0.5 mg. Comes with 6 needles.
- 1 mg pen (blue label): Contains 4 mg total. Delivers 4 doses of 1 mg. Comes with 4 needles.
- 2 mg pen (yellow label): Contains 8 mg total. Delivers 4 doses of 2 mg. Comes with 4 needles.
The red-label starter pen is a bit different from the others. It’s designed to cover your first 6 weeks on Ozempic: 4 weeks at the 0.25 mg starting dose, then 2 weeks at 0.5 mg. That’s why it ships with 6 needles instead of 4.
The 56-Day Storage Window
Once you first use your Ozempic pen, or once it’s been outside the refrigerator, a 56-day clock starts. After 56 days, you need to discard the pen even if medication remains inside. This applies whether you store the opened pen in the fridge or at room temperature.
Since each pen holds 4 weekly doses (about 28 days of use), most people will finish their pen well before the 56-day limit. The generous window exists partly to account for the starter pen’s 6-week schedule and to give you a safety buffer if you miss or delay an injection.
Before first use, an unopened pen should be stored in the refrigerator between 36°F and 46°F. It stays good until the expiration date printed on the label. If an unopened pen sits out at room temperature at any point, the 56-day rule kicks in from that moment forward.
Proper Storage Temperatures
After opening, you can keep your pen either in the refrigerator (36°F to 46°F) or at room temperature (59°F to 86°F). Both are fine for the full 56 days. The key limits to avoid are heat above 86°F and freezing. If the pen freezes or gets too warm, it should not be used.
Before each injection, check that the liquid in the pen window looks clear and colorless. If it appears cloudy, contains particles, or the pen feels unusually warm, don’t use it. These are signs the medication has degraded.
Always keep the pen cap on when you’re not injecting. This protects the medication from light, which can break it down over time.
Traveling With Your Pen
Ozempic pens travel well within that 56-day window, but temperature control matters. If you’re flying, pack the pen in your carry-on luggage rather than checked bags. Cargo holds can reach extreme temperatures that could damage the medication. Place the pen in an insulated travel case or small cooler to keep the temperature stable, and declare it at security along with any cooling packs in a clear plastic bag.
In a car, keep the pen in the passenger cabin rather than the trunk, where heat can build up quickly. Never leave it sitting in a parked car for extended periods, especially in warm weather. If the ambient temperature is above 86°F, an insulated case or cooler is essential rather than optional.
When to Start a New Pen
You’ll need a new pen when either condition is met: you’ve used all 4 doses, or 56 days have passed since you opened it (or since it left the fridge), whichever comes first. For most people on a steady weekly schedule, the pen runs out of doses around day 28, well within the storage window. If you’re on the starter pen following the standard titration schedule, you’ll use all 6 doses over about 42 days, still comfortably under the 56-day limit.
If you’ve skipped weeks and your pen has been sitting for close to 56 days, check the date you first used it. Even if doses remain, the medication may no longer be reliable past that cutoff. Writing the “first use” date on the pen label is a simple way to keep track.