GLP-1 Pen vs Vial Cost Comparison
Compare two verified out-of-pocket quotes over twelve calendar months. Use the same days supplied for both quotes. A formulation change requires your prescriber; the calculator does not establish interchangeability or product availability.
Method, assumptions and limits
Annual pen cost = monthly pen quote ×12. Annual vial cost = (monthly vial quote + extra monthly supplies) ×12. The signed difference is pen minus vial. A negative difference means the vial scenario costs more. Zero-cost quotes are accepted.
No drug prices or unverified presentations are prefilled. A 28-day price is not a calendar-month quote: use the annual calculator for days-supply billing and full refill payments. Include only costs not already included in the quoted price.
Correction October 19, 2026: removed unverified drug/formulation price examples, an unsupported syringe-box monthly allocation and claims that every result is a saving. Inputs now accept zero and reject negative or malformed amounts.
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Method and interface checked October 19, 2026. Next scheduled review: January 19, 2027. Written and maintained by The Health Architect, a non-clinician researcher. Research and correction standards.