Phentermine is the price floor of the American weight-loss drug market. It is a 1959-vintage appetite suppressant, generic since long before most people reading this were born, and a full month of it costs less than a large pizza. That fact sits awkwardly next to a category where the newest drugs run $200 to $1,000 a month, and it is the single most useful thing an uninsured shopper can know.
This guide covers published cash and coupon prices checked on September 2, 2026, the 2026 CMS acquisition cost that shows what pharmacies actually pay, brand-name Lomaira and its manufacturer card, and the part most price roundups leave out: because phentermine is a controlled substance, the prescriber visit is a real and recurring line item. Prices vary by pharmacy and zip code, so treat these as national reference points rather than quotes.
What Does Phentermine Cost Without Insurance?
All figures below were checked on September 2, 2026. The acquisition-cost rows come from the CMS National Average Drug Acquisition Cost file with an effective date of August 19, 2026.
| Option | Low | Typical | High |
|---|---|---|---|
| Generic 37.5 mg tablet, 30 days, discount card | $8.66 | $10.00 | $10.58 |
| Generic 37.5 mg tablet, 30 days, no card | n/a | $51.00 | n/a |
| Generic 37.5 mg tablet, 90 count, cash | n/a | $16.14 | n/a |
| Generic 15 mg capsule, 30 count, cash | n/a | $8.43 | n/a |
| Generic 30 mg capsule, 30 count, cash | n/a | $8.47 | n/a |
| Generic 37.5 mg capsule, 30 count, cash | n/a | $8.00 | n/a |
| Brand Lomaira 8 mg, 90 tablets, cash | $45.00 | $58.69 | n/a |
| Brand Lomaira 8 mg, 30 tablets | $15.00 | $26.00 | $41.00 |
| Prescriber telehealth consult (manufacturer partner) | n/a | $45.00 | n/a |
| CMS NADAC acquisition cost, 37.5 mg tablet, 30 days | n/a | $2.13 | n/a |
Two independent price sources agree closely. SingleCare’s September 2026 cost explainer states the price without insurance is about $51 for 30 tablets of the 37.5 mg strength and can drop to about $10 with a coupon. The Drugs.com price guide, which quotes cash prices for people not using insurance, lists the same 30-count at $8.66 to $10.58.
A note on the pharmacy-by-pharmacy tables the discount-card sites publish: a single named chain’s card price moves between visits and is not something a reader can reliably reproduce by clicking through. Use the average retail and “as low as” figures as your benchmarks and treat the chain-by-chain rows as a picture of the spread, not a price list.
The most striking number in the table is the last one. CMS publishes what retail and independent pharmacies actually pay to buy drugs, and in the file effective August 19, 2026, a phentermine 37.5 mg tablet has a national average acquisition cost of 7.085 cents. Thirty of them cost a pharmacy $2.13. The 15 mg capsule is 9.942 cents, the 30 mg capsule is 12.151 cents, and the 37.5 mg capsule is 10.181 cents, so every common form of generic phentermine costs a pharmacy under $4 a month to stock. Everything above that is dispensing fee, margin, and whether you handed over a coupon.
Brand-name Lomaira is a different product rather than a marked-up version of the same one. It is an 8 mg scored tablet, a much lower dose, dosed up to three times a day. Drugs.com prices it at $58.69 for 90 tablets, and the 2026 CMS file puts its acquisition cost at 61.598 cents a tablet, roughly nine times the generic 37.5 mg tablet per pill. KVK Tech’s Lo-Cost Access card caps the patient price at 50 cents a tablet with a 30-tablet minimum, which the company states means no more than $15 a month once daily, $30 twice daily, and $45 three times daily. SingleCare’s September 2026 explainer prices a 30-tablet supply of Lomaira at $41 without insurance and about $26 with its card at one chain, though a single chain’s card price moves between visits, so read that as the shape of the spread rather than a quote.
What Drives the Price
Coupon or no coupon. This is the whole story on the generic. The identical bottle is roughly $50 at the counter and roughly $10 with a free discount card. Pharmacies do not volunteer the lower price, so you have to ask.
Tablet versus capsule. The 37.5 mg tablet is the cheapest form to acquire (7.085 cents versus 10.181 cents for the capsule in the 2026 CMS file), and it is the form the coupon networks price most aggressively. If your prescription is written for capsules and the price comes back high, that is worth a conversation with the prescriber.
Quantity per fill. Drugs.com lists 90 tablets of the 37.5 mg strength at $16.14, less than twice the 30-count price. The catch is that the prescription has to be written for 90 days up front, and because phentermine is a Schedule IV drug, prescribers and state boards frequently will not write it that way.
Brand versus generic. Lomaira’s own manufacturer card brings it to $15 to $45 a month depending on dosing frequency, which is competitive with an uncouponed generic fill. That is unusual for a brand.
The prescriber, not the pill. On a $10 medication, the visit is the expensive part. Lomaira’s manufacturer routes patients to a telehealth partner charging a $45 consultation fee across a listed set of states, with an in-person physician finder for the rest. Two or three of those a year exceed the annual drug cost.
Why Phentermine Is the Cheapest Weight-Loss Drug in the Pharmacy
The comparison that matters most for a cash payer is not phentermine against another appetite suppressant. It is phentermine against the GLP-1 class that has taken over the category.
Novo Nordisk’s own NovoCare Pharmacy page prices Wegovy for self-pay patients at $349 a month on the standard offer, $199 a month for the first two fills for new patients through December 31, 2026, and $149 to $299 a month for the oral form depending on strength. Set that beside $9 to $11 for a month of generic phentermine and the ratio is roughly 30 to 1, even before the counter price is considered.
The middle of the market runs through Qsymia, which is phentermine combined with topiramate. Generic phentermine-topiramate ER now exists, and the 2026 CMS file puts its acquisition cost at $3.14 to $3.29 per capsule, or about $94 to $99 for a 30-day supply, roughly 45 times the acquisition cost of plain phentermine. Our Qsymia cost guide breaks that one down, and the Contrave cost guide covers the other branded oral option at $99 a month through its manufacturer program.
None of this says which drug anyone should take. Effectiveness, side effects, and whether a stimulant is appropriate at all are prescriber questions. It says what each rung of the ladder costs when nobody else is paying. Our GLP-1 cost guide and Wegovy cost guide cover the top of that ladder.
The Controlled Substance Tax
Phentermine sits in Schedule IV of the federal controlled substances schedules, listed by name at 21 CFR 1308.14 under stimulants. That classification is invisible on a price tag but shapes the real cost in three ways.
First, refills are capped. Under 21 CFR 1306.22, no Schedule III or IV prescription may be filled or refilled more than six months after the date it was written, and no such prescription may be refilled more than five times. That is a federal ceiling, and prescribers and state boards routinely set tighter limits, which is why phentermine is commonly dispensed a month at a time.
Second, that cap means recurring prescriber contact. A statin can ride an annual prescription with automatic refills. Phentermine cannot, so the visit fee repeats. At the $45 telehealth rate advertised by Lomaira’s partner, two visits a year add $90 to a drug that costs about $120 a year at the coupon price. The visit is nearly half the total.
Third, transfers and early fills are restricted in ways ordinary generics are not, so price the pharmacy before the prescription is sent, not after.
Cash Price vs. Insurance
Weight-management drugs are one of the categories insurers carve out most aggressively, so a phentermine buyer is frequently self-pay even while holding a card. On a drug this cheap, that turns out not to matter much.
A $9 to $11 coupon price is at or below most plan copays, and running the claim through insurance can cost more than not running it. You cannot stack a discount card on top of insurance, but you can ask the pharmacy to price it both ways on every fill and pay whichever is lower. This is one of the few drugs on this site where the uninsured shopper and the well-insured one pay roughly the same thing.
Where insurance status does matter is the prescriber visit. If you are uninsured, that visit is the dominant cost, and it is the piece worth shopping. Federally qualified health centers charge on a sliding scale tied to income, which can bring a visit well below any telehealth flat fee. Our guide to free clinics and sliding-scale care explains how to find one, and our doctor visit cost guide lays out what a cash office visit runs.
How to Pay Less
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Never fill without running both coupon networks. GoodRx and SingleCare price the same generic differently at the same chains on the same day. Two minutes of comparison is the difference between $10 and $50 here. Our GoodRx vs. SingleCare comparison walks through both.
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Ask for the 37.5 mg tablet if the price comes back high on capsules. The tablet is the cheapest form for a pharmacy to acquire and the one the coupon networks discount hardest. Form and strength are prescriber decisions, but it is a fair question to raise.
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Get the prescription written for 90 days where your prescriber and state allow it. Drugs.com prices 90 tablets at $16.14 against $8.66 to $10.58 for 30. The saving is modest on the drug and large on avoided visit fees.
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Use the manufacturer card if you are on Lomaira. KVK Tech’s Lo-Cost Access program caps the price at 50 cents a tablet for the duration of treatment, with a 30-tablet minimum. That is $15 to $45 a month depending on how many times a day it is prescribed, and it does not expire the way most brand coupons do.
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Shop the visit harder than the pills. On a $10 drug, the consultation is the bill. Compare a sliding-scale community health center against flat-fee telehealth, and see our guide to negotiating medical bills if a clinic quotes something above its own posted self-pay rate.
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Sanity-check any quote over $25. If a pharmacy asks $50 or more for 30 tablets of generic phentermine, you are paying the uncouponed counter price on a drug that cost the pharmacy $2.13. That is a signal to switch pharmacies, not to pay. Our fair price checker gives you a reference number to argue from.
Bottom Line
Budget $9 to $11 a month for generic phentermine 37.5 mg with a free coupon, or about $50 if you fill it without one, as of September 2026. Brand Lomaira lands between $15 and $59 a month depending on dosing and whether you use the manufacturer card. Add a prescriber visit at least twice a year, starting around $45 for telehealth and lower at a sliding-scale clinic.
That total, call it $150 to $400 a year all in, is the floor of the weight-loss drug market. The next rungs up are Contrave at $99 a month through its manufacturer program, Qsymia in the low hundreds, and the GLP-1 class starting around $149 to $349 a month from the manufacturer. If surgery is on the table further down the road, our bariatric surgery cost guide prices that end of the range.