Drugs cost what
drugs cost.
We just write
it down.
We publish the US private-pay price of 6 prescription molecules each month, alongside the international generic price from a licensed pharmacy, and the publicly listed cash prices from CVS, GoodRx, Costco, Cost Plus, and Amazon Pharmacy. Same molecule, same dose, six receipts. The molecule does not care which country it is in.
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The Receipts
| Molecule / Dose | CVS cash | GoodRx coupon | Costco member | Cost Plus | Amazon Pharmacy | PHARMAX | PMI vs cheapest US |
|---|---|---|---|---|---|---|---|
| TirzepatideMounjaro . 5mg weekly | $1,247 / mo | $1,069 / mo | $999 / mo | - | $1,023 / mo | $648 / mo | 39.4% |
| SemaglutideWegovy . 2.4mg weekly | $1,349 / mo | $968 / mo | $1,278 / mo | - | $1,349 / mo | $799 / mo | 17.5% |
| SildenafilViagra . 100mg | $24.99 | $1.78 | $2.10 | $1.50 | $2.40 | $0.45 | 74.7% |
| ArmodafinilNuvigil . 150mg | $86.40 | $12.10 | $14.50 | $9.20 | $18.90 | $0.87 | 92.8% |
| FinasteridePropecia . 1mg | $4.95 | $0.27 | $0.21 | $0.14 | $0.50 | $0.08 | 42.9% |
What is PMI?
The PHARMAX Mispricing Index is a number between 0 and 100. The bigger the number, the more of your prescription is markup. That is the entire pitch. The rest of this page is the receipts.
Highest Mispricing - This Month
| Molecule | US Private Pay | International | PMI Score | Sourcing |
|---|---|---|---|---|
| Avanafil 100mgStendra | $80 / tablet | $40 / tablet | 49.8 | Find best price → |
| Armodafinil 150mgNuvigil | $50 / tablet | $26 / tablet | 47.8 | Find best price → |
| Tirzepatide 5mg (weekly)Mounjaro | $1,069 / mo | $674 / mo | 36.9 | Find best price → |
| Vardenafil 20mgLevitra | $50 / tablet | $36 / tablet | 28.6 | Find best price → |
| Semaglutide oral 14mgRybelsus | $968 / mo | $741 / mo | 23.4 | Sourcing soon |
You saw the numbers.
Now what?
Understand personal-use import rules
In the US, the FDA generally exercises enforcement discretion for personal-use quantities of non-controlled medications imported from abroad. Rules vary by drug classification. Read the methodology .
Verify international pharmacy licensing
Reputable international pharmacies operate under national regulatory frameworks. Singapore HSA, MHRA UK, EMA EU all publish licensed dispenser registers. Check HSA Singapore .
Consult a licensed healthcare provider
Any prescription medication requires a valid prescription regardless of source. Telehealth platforms can issue legitimate prescriptions that international pharmacies will accept.
Before you click through
- Destination. The next click leaves rxpricetracker.com for pharmax-ai.com. That is the pharmacy that funds this publication.
- Registration. pharmax-ai.com operates under HSA Singapore dispenser licensure since 2024. The license number is on the pharmacy About page.
- Prescription. You will need one. The pharmacy will not dispense without it, regardless of what country you are in.
- Alternatives. If you would rather not, the other 5 source links in the Receipts table above all go to US providers. Cost Plus Drugs is usually the cheapest of those for generics.
Publisher's note. Rx Price Tracker is funded by PHARMAX, one of the international pharmacies whose prices we publish on this page. PHARMAX does not control which molecules we cover, which competitors we include, or which corrections we issue. Every price observation links to its source URL and capture date. The data is reproducible. We track the gap because pricing transparency works in any direction.