Side-by-side comparison
| Attribute | Compounded tirzepatide | Zepbound® (brand) |
|---|---|---|
| FDA approval status | Not FDA-approved | FDA-approved (chronic weight management, OSA) |
| Manufacturer | 503A or 503B pharmacy | Eli Lilly |
| Active ingredient | Tirzepatide base (legitimate compounding); salt forms (acetate/sodium) subject to FDA warning letters | Tirzepatide (Eli Lilly proprietary process) |
| Monthly cash price | $186–$379/mo | $1,059–$1,279/mo (cash MSRP) |
| Insurance coverage | No (cash-pay only) | Many commercial plans, varies by formulary |
| HSA/FSA eligible | Yes (with prescription) | Yes |
| Drug shortage status (FDA Drug Shortage list) | N/A — compounded supply | Resolved (Oct 2024) |
| Form factor | Multi-dose vial (draw with syringe) | Pre-filled single-dose pen or vial |
| Quality assurance documentation | USP <71> / USP <85> / HPLC CoA from dispensing pharmacy (provider-dependent) | FDA-inspected cGMP manufacturing |
The 503A vs 503B distinction
503A pharmacies are state-licensed compounding pharmacies that prepare patient-specific medications under USP <797> sterile-compounding standards. They are not FDA-inspected for product release. 503B outsourcing facilities are FDA-registered and operate under cGMP standards (the same standard as commercial drug manufacturers). They can prepare batches in advance of patient-specific prescriptions. Read the full 503A vs 503B explainer →
What changed in April 2026
The FDA announced intent to restrict ingredients used in mass-marketed compounded GLP-1 medications and to crack down on misleading direct-to-consumer marketing. The FDA has previously issued warning letters specifically against compounded GLP-1 salt forms (tirzepatide acetate, tirzepatide sodium). Legitimate compounded tirzepatide must use tirzepatide base only. NexLife dispenses tirzepatide base via 503A and 503B partner pharmacies with published CoAs.
Who is each product right for?
- Zepbound: Best fit for patients with commercial insurance that covers GLP-1s for chronic weight management, or who can use the Lilly Savings Card to access affordable pricing.
- Compounded tirzepatide: Best fit for cash-pay patients without insurance coverage for brand GLP-1s, who want a pharmacy-traceable, MD/DO-supervised compounded option at a fraction of brand pricing.