Head-to-head · Cost-Efficiency Index
InstaRX vs Good Girl Rx
Two GLP-1 programs on the bench, scored on the same six factors. Here's how their real cost of ownership compares — and which one we'd start with.
InstaRX
Cost-first shoppers who want one flat price at every dose, for shoppers who don't want to guess what a dose increase will cost.
Visit InstaRXGood Girl Rx
Cost-first shoppers who want multiple compounded GLP-1 formats with pharmacy quality standards.
Visit Good Girl RxThe verdict
InstaRX takes it, leading the Cost-Efficiency Index 67 to 66. InstaRx sells compounded semaglutide and tirzepatide at a single flat monthly price regardless of dose — $179/mo and $259/mo respectively — with free expedited shipping. Good Girl Rx still earns a C — Cost-first shoppers who want multiple compounded GLP-1 formats with pharmacy quality standards.
Worth knowing either way: our overall #1 pick is CoreAge Rx (Cost-Efficiency Index 94/100 — the top of the ranking). See how it stacks up: CoreAge Rx vs InstaRX.
Factor by factor
Both providers scored on our six Cost-Efficiency Index factors. The stronger side on each row is marked in teal.
Normalized Cost/Month
Price Transparency
Nationwide Access
Formulation Options
Clinical Oversight
Contract Flexibility
Pricing, coverage & formulary
The disclosed facts behind the scores. Lower price wins its row (teal).
| Spec | InstaRX | Good Girl Rx |
|---|---|---|
| Cost-Efficiency Index | 67/100 | 66/100 |
| Semaglutide / mo | $179/mo | $79/mo (microdose tier, 12-month plan, compounded) |
| Tirzepatide / mo | $259/mo | $139/mo (microdose tier, 12-month plan, compounded) |
| Semaglutide / yr (modeled) | $2,148 | $948 |
| Tirzepatide / yr (modeled) | $3,108 | $1,668 |
| Coverage | All 50 states | All 50 states |
| Oral / sublingual | No | Yes |
| Brand-name access | Compounded only | Yes |
| Rank here | #139 | #143 |
InstaRX
67/100Where the value is
- Flat 'same price any dose' model for both drugs ($179/mo semaglutide, $259/mo tirzepatide) — no dose-tier guesswork
- Free expedited shipping stated explicitly
- States medications come 'exclusively from U.S. pharmacies'
The tradeoffs
- The homepage's own '$199 to get started' figure is never explained anywhere on the site — unclear if it's a one-time signup charge, the first month's payment, or an additional charge on top of the $179/$259 monthly prices
- No medical director or named prescriber anywhere — only generic 'third-party professional healthcare providers' language
Good Girl Rx
66/100Where the value is
- LegitScript certified
- Multiple formats — injectable, microdose, and ODT pills — for both semaglutide and tirzepatide
- Dispensed by licensed 503A or 503B pharmacies
The tradeoffs
- The advertised rates require twelve months paid up front; billed month to month the same products are $184 and $244, roughly 2.3 times as much
- Every plan is prepaid — the discount exists only on the 3-, 6- and 12-month terms
Regulatory note: the FDA issued a warning letter to Good Girl LLC dba GoodGirlRX in February 2026. We still list and link to Good Girl Rx; you should know the letter is on the public record before you decide.
Assume any provider we list may compensate us — we may earn a commission, at no cost to you. It never changes the Cost-Efficiency Index. Pricing, states and verification reflect each provider's public disclosures at last review; prices change — confirm on the provider's site. Not medical advice. See our disclosure.