Redose
A semaglutide dosage chart answers one practical question: how much of the drug goes into the syringe this week. The trouble is that there is no single chart. A branded Ozempic pen counts clicks, a Wegovy pen counts dose steps in milligrams, and a reconstituted vial is measured in syringe units. This guide lines up all three so the numbers stop fighting each other.
Read this as a reference, not a prescription. Every figure below comes from published labels and reconstitution protocols, and a good semaglutide dosage chart only tells you what trials and manufacturers used. Redose is for tracking and record-keeping only, so use it to log what your prescriber has already set, not to change a dose on your own.
How a Semaglutide Dosage Chart Works
The active molecule is the same everywhere: semaglutide. What changes is the delivery. A branded pen arrives premixed at a fixed concentration, so the device meters the dose for you. A vial of powder or solution has to be reconstituted first, which means you draw the dose yourself in units on an insulin syringe. A semaglutide dosing chart is really three charts wearing one name.
Concentration is the hinge. Once you know how many milligrams sit in each milliliter, every dose converts cleanly to volume and then to units. Get the concentration wrong and the whole semaglutide dose chart shifts. That is why the first step with any vial is writing down the vial size and the water you added.
- Ozempic pens: doses set by clicks per turn
- Wegovy pens: fixed milligram dose steps
- Vials: milligrams converted to syringe units
- All three climb on the same 4-week ladder
The Branded Chart: Ozempic and Wegovy Dose Steps
The branded pens follow a fixed climb. An ozempic dosage chart starts at 0.25 mg once weekly for four weeks, moves to 0.5 mg, then 1 mg, and can reach 2 mg once weekly, with increases spaced about four weeks apart. Ozempic ships in three pen strengths: a 2 mg pen for the 0.25 and 0.5 mg steps, a 4 mg pen for 1 mg, and an 8 mg pen for 2 mg, each holding four weekly doses.
A wegovy dosing chart runs five steps instead of four: 0.25 mg, 0.5 mg, 1 mg, 1.7 mg, and a 2.4 mg maintenance dose, each held for four weeks before the next increase. People who read an ozempic click dose chart are counting the audible clicks the dial makes, since the 1 mg and 2 mg Ozempic pens both turn through 72 clicks even though each click delivers a different amount.
| Weeks | Ozempic | Wegovy |
|---|---|---|
| 1 to 4 | 0.25 mg | 0.25 mg |
| 5 to 8 | 0.5 mg | 0.5 mg |
| 9 to 12 | 1 mg | 1 mg |
| 13 to 16 | 2 mg | 1.7 mg |
| 17 and on | 2 mg | 2.4 mg |
A starter Ozempic pen holds four 0.25 mg doses or two 0.5 mg doses, which is why a single pen rarely lasts more than a month.
The Vial Chart: Syringe Units After Reconstitution
Vials are where a semaglutide reconstitution calculator earns its keep. Take a common 10 mg vial and add 3 mL of bacteriostatic water and you land at about 3.33 mg per mL. Our dose calculators and the reconstitution guide walk through the same arithmetic step by step.
At 3.33 mg per mL, one unit on a U-100 insulin syringe holds 0.01 mL, which is about 33.3 mcg, a figure drawn from published reconstitution protocols. That single conversion turns any milligram target into a mark on the barrel. A semaglutide units chart simply lists the common doses next to the units they represent so you are not doing mental math at injection time.
| Dose | Units | Volume |
|---|---|---|
| 250 mcg | 7.5 units | 0.075 mL |
| 500 mcg | 15 units | 0.15 mL |
| 1000 mcg | 30 units | 0.30 mL |
| 1700 mcg | 51 units | 0.51 mL |
| 2400 mcg | 72 units | 0.72 mL |
Reading units on a U-100 syringe
U-100 means 100 units fill 1 mL, so each unit is 0.01 mL. Draw to the number the chart gives, hold the syringe at eye level, and tap out air bubbles before you check the mark again. If your vial concentration differs from 3.33 mg per mL, the units change and you need to rebuild the chart for your own vial.
- One unit equals 0.01 mL on a U-100 barrel
- 7.5 units is roughly a 250 mcg starting dose
- 72 units maps to a 2.4 mg maintenance dose
- Recheck the mark at eye level before injecting
How Long One Vial Lasts
Because titration starts small, a 10 mg vial stretches further at the beginning than at the end. During the first four weeks at 250 mcg you draw only 0.075 mL a week, so the vial is barely touched. Once you reach a 2.4 mg maintenance dose you are pulling 0.72 mL each week, and 10 mg of drug covers only about four of those larger injections.
- 8 weeks of titration uses about 3 mg total
- 12 weeks uses about 7 mg, one vial covers it
- 16 weeks uses about 13.8 mg, so two vials
- 20 weeks uses about 23.4 mg, so three vials
Reconstituted semaglutide is usually kept at 2 to 8 degrees Celsius and used within 28 days, so the calendar can retire a vial before the milligrams run out.
That 28-day window matters more than the leftover drug. Even if a low starting dose leaves most of the vial full, the beyond-use date still applies, and stretching past it is not something a chart can bless. Our note on GLP-1 storage covers the cold-chain details.
Planning Supplies From the Chart
Once the chart is set, supply planning is subtraction. A semaglutide dose calculator turns your weekly milligram target into a volume, and counting weeks against vial size tells you when to reorder. Logging each draw in a running record means the reorder alert fires before you hit an empty vial, not after.
- Match vial size to your maintenance dose
- Count remaining weeks, not remaining milliliters
- Reorder while at least one dose remains
- Log the concentration written on each vial
Safety and What to Discuss With a Prescriber
A semaglutide weight loss dosage chart shows what trials and labels used, not what is right for any one person. Do not start, stop, or change a dose based on a chart, and follow the schedule your prescriber wrote. Slower titration is allowed when side effects are hard to tolerate, but faster climbs are not part of the approved plan.
The chart is a map, not a green light. The prescription your clinician writes always overrides any dosing table you find online.
FAQ: Semaglutide Dosage Questions
How do I read a semaglutide dosage chart?
Start with the format you actually have. If it is a pen, follow the milligram step for the current week. If it is a vial, find your milligram dose, then read across to the units and volume for your concentration. A semaglutide dosage chart only works once you confirm the concentration it assumes.
How many units is a 0.25 mg semaglutide dose?
At a concentration of 3.33 mg per mL, a 250 mcg (0.25 mg) dose is 7.5 units, or 0.075 mL, on a U-100 syringe. If your vial is mixed to a different strength, that number changes, which is why a semaglutide units chart is tied to one specific concentration.
How long does a reconstituted semaglutide vial last?
It depends on both dose and the clock. A 10 mg vial holds enough drug for many small titration doses or about four full 2.4 mg doses, but reconstituted semaglutide is generally used within 28 days of mixing. The 28-day beyond-use date often ends a vial before the milligrams do.
Is the Ozempic dosage chart the same as Wegovy?
No. An ozempic dosage chart for weight loss tops out at 2 mg once weekly, while Wegovy climbs one step higher to a 2.4 mg maintenance dose. Both share the same 0.25 mg start and four-week increases, so the early weeks look identical even though the ceilings differ.
Keep every step of your semaglutide dosage chart in one place. Redose turns vial size and bacteriostatic water into exact syringe units, logs each dose in a tap, rotates injection sites, and tracks inventory so a reorder alert beats the empty vial. It is for tracking and record-keeping only, always alongside your prescriber's plan. Get the app here: iOS.