Learn how to save money on Phentermine in 2026. Compare cash prices, find coupons and discount cards, and discover patient assistance programs to lower your costs.
Here's the good news up front: Phentermine is one of the most affordable prescription weight-loss medications available. Generic Phentermine 37.5 mg can cost as little as $10-$15 per month with a discount card — a fraction of what newer medications like Wegovy ($800-$1,300/month) or Zepbound ($1,000-$1,500/month) cost.
But "affordable" is relative, especially if you're paying out of pocket, don't have insurance, or are managing multiple prescriptions. In this guide, we'll break down exactly what Phentermine costs, where to find the best prices, and how to use coupons, discount cards, and patient assistance programs to bring your costs as low as possible.
Without any discounts or insurance, the retail (cash) price of Phentermine varies by formulation, pharmacy, and location:
The price spread is wide because pharmacies set their own retail prices. A big chain pharmacy might charge $60 for the same medication that an independent pharmacy sells for $20. That's why comparison shopping matters — even for an affordable drug like Phentermine.
Pharmacy discount cards are the fastest, easiest way to lower your Phentermine costs. They're free to use, require no enrollment or insurance, and work at most retail pharmacies. Here are the top options:
Typical price with GoodRx: $8-$20 for generic Phentermine 37.5 mg #30
GoodRx is the most widely known pharmacy discount platform. Search for Phentermine on goodrx.com, compare prices at pharmacies near you, and show the coupon at the counter. You can also use the GoodRx app on your phone.
Typical price with SingleCare: $9-$22 for generic Phentermine 37.5 mg #30
SingleCare works similarly to GoodRx and is accepted at most major chains including CVS, Walgreens, and Walmart. It's worth comparing prices on both platforms, as one may offer a better deal at your specific pharmacy.
Typical price with RxSaver: $10-$25 for generic Phentermine 37.5 mg #30
RxSaver aggregates prices from multiple discount card providers, giving you a broader comparison in one search.
Several other discount programs may offer competitive pricing:
Pro tip: Prices vary by pharmacy and change frequently. Always compare 2-3 discount cards before filling. The extra 60 seconds of comparison can save you $5-$15.
Two retailers consistently offer some of the lowest prices on generic medications:
Walmart's pharmacy typically offers generic Phentermine at competitive prices, often $10-$15 for a 30-day supply with or without a discount card. Check Walmart's $4 prescription list — while Phentermine isn't always on the standard $4 list, their generic pricing is still among the lowest.
Costco pharmacies consistently rank among the cheapest for generic medications. You do not need a Costco membership to use their pharmacy. Generic Phentermine 37.5 mg #30 is often $8-$15 at Costco.
If you have health insurance, check whether Phentermine is covered on your plan's formulary:
Important: Even if your insurance covers Phentermine, your copay might be higher than the discount card price. This is especially true with high-deductible plans. Always compare your copay to the GoodRx or SingleCare price before using insurance.
Because generic Phentermine is so affordable, there are no major manufacturer patient assistance programs specifically for this medication. However, if even $10-$20/month is a hardship, these resources may help:
NeedyMeds maintains a database of patient assistance programs, discount drug cards, and financial resources for people who can't afford medications. Search for Phentermine to see current options.
RxAssist is another comprehensive database of patient assistance programs. While Phentermine-specific programs are rare, RxAssist can help you find general prescription assistance in your area.
Many states, counties, and nonprofit organizations offer prescription assistance programs for low-income residents. Contact your local health department or 211 helpline to learn what's available in your area.
Brand-name versions of Phentermine (Adipex-P, Lomaira) occasionally offer manufacturer coupons or copay assistance. Check the manufacturer websites or ask your pharmacist about current offers. However, given the low generic price, the generic is almost always the better deal.
If your doctor prescribes Phentermine for a longer course, a 90-day fill can sometimes offer per-pill savings over three separate 30-day fills. Not all pharmacies offer this for controlled substances, but it's worth asking.
Pharmacy prices change. The cheapest pharmacy for your last fill might not be the cheapest this month. Take 60 seconds to check GoodRx or SingleCare before each refill.
Independent pharmacies often have more competitive pricing for generic medications than large chains. They may also be willing to price-match discount card offers.
Some physicians' offices keep Phentermine samples from brand-name manufacturers. While this isn't a long-term savings strategy, a free sample can bridge a gap while you arrange a more affordable fill.
Phentermine is already one of the most affordable prescription medications you can get — but with the right approach, you can bring the cost down even further. Use discount cards like GoodRx or SingleCare, compare prices at Walmart and Costco, and don't assume your insurance copay is the best price.
If you're having trouble finding Phentermine in stock, check Medfinder to see which pharmacies near you have it available. And if cost is still a concern, talk to your doctor — they may know about local assistance programs or be able to adjust your prescription to the most affordable option.
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