Enter your vial size and bacteriostatic water, then the weekly dose in milligrams. The calculator returns the concentration and the draw on a U-100 syringe.
Reviewed for accuracy · Last reviewed July 7, 2026The example mixes a 5 mg vial with 2 mL of water for 2.5 mg/mL, where a 1 mg dose is 0.4 mL, or 40 units. All the labeled weight-management doses fit inside one 100-unit syringe at this concentration.
The approved weight-management titration (Wegovy) begins at 0.25 mg once weekly and steps up every 4 weeks toward a 2.4 mg maintenance dose. Compounded or independently sourced vials are not tested to the same standard as the branded pen.
This page is an independent educational reference and is not medical advice. Talk to a doctor before starting or adjusting any compound.