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Compounded semaglutide vs Phentermine (generic)

Verdict

Phentermine (generic) is the better choice of the two, winning on regulatory and complaint risk and brand vs compounded (halfrx score 3.1 against 2.9).

Computed from the stored fields, so it moves when a price does. Nothing here is written by hand or by a model.

Compounded semaglutide or Phentermine (generic): which publishes a price?

Only one of these two publishes a verified all-in price, which settles the comparison before any other axis is reached: Compounded semaglutide at $149–$299, and no figure at all for the other. Phentermine (generic) is the better choice of the two, winning on regulatory and complaint risk and brand vs compounded (halfrx score 3.1 against 2.9). Every axis below is computed from stored fields rather than written by hand, so the comparison moves when a price does. Flags recorded here: Compounded semaglutide — not fda approved, supply risk. One is compounded and the other generic, which is the difference between an FDA-approved product and a copy made under the compounding exemption. The published formula scores them 2.9 and 3.1 out of 10, arithmetic over the same stored fields rather than an editor's preference.

Head to head

Compounded semaglutide against Phentermine (generic), one row per axis, with the side that wins each axis marked.
What decides itCompounded semaglutide
$149–$299/mo
Phentermine
price unverified
Entry priceNot comparable — Phentermine (generic) publishes no verified all-in price.not comparablenot comparable
Regulatory and complaint riskCompounded semaglutide: 2 serious flags. Phentermine (generic): none.✓ better here
Brand vs compoundedPhentermine (generic) supplies FDA-approved branded medication; Compounded semaglutide supplies compounded, which the FDA does not review for safety, efficacy or quality and which can stop shipping if its pharmacy is enjoined.✓ better here
Compounded semaglutide publishes no page halfrx will send you toGo to Phentermine

Read the price gap carefully: these two are not the same purchase

  • These are different molecules — Compounded semaglutide on semaglutide, Phentermine (generic) on phentermine — so this is a comparison of two treatments, not of two prices for one.
503A/503B compounding pharmacies
Compounded semaglutide
2.9
$149–$299/mo all-in
Checked 2026-06-10
Not FDA approvedCompounding legal riskSupply risk
Multiple generic manufacturers
Phentermine (generic)
3.1
Price unverified
Controlled substanceWeaker moleculeNo published priceStrict dosing rules

Compounded semaglutide

Pros

  • +$149–$199/mo puts semaglutide within reach for people who would otherwise take nothing — the branded self-pay floor is $349.[1]
  • +Often shipped in vials with flexible dosing, so a provider can titrate in smaller steps than the fixed branded pen doses allow.[1]

Cons

  • Not FDA approved. The agency does not review compounded drugs for safety, efficacy or manufacturing quality — potency and sterility depend entirely on the individual pharmacy.[1]
  • The FDA declared the semaglutide shortage resolved, which removed the legal basis for mass compounding of copies. Providers now rely on 'personalized dose' arguments that Novo Nordisk is actively litigating.[2]
  • Supply can stop mid-titration. A court order or state action against your compounder ends your prescription with no notice — Mochi's affiliated pharmacy is under a Washington State Notice of Immediate Jeopardy.[2]
  • Some products are semaglutide salts (sodium or acetate) rather than the base molecule studied in trials. The FDA has warned these are different substances.[1]

Sources

  1. [1] GLP-1 Telehealth Price Report 2026
  2. [2] Compounded GLP-1 providers under active litigation

Phentermine (generic)

Pros

  • +The cheapest drug in the category by two orders of magnitude: $0.068 a tablet at pharmacy acquisition cost against $263 for one Zepbound pen.[2]
  • +Covered by more Medicaid programmes than any GLP-1 — seven states cover an older weight-loss agent while covering no GLP-1 at all.[3]
  • +One tablet each morning, no injection, no titration schedule beyond a possible half dose.[1]

Cons

  • Approved for a few weeks only. Every monthly subscription selling it as ongoing therapy is using it off the label's own duration.[1]
  • Schedule IV controlled substance, chemically related to the amphetamines, with the dependence warnings that follow from that.[1]
  • Stopping after prolonged high dosing brings extreme fatigue and depression, per the label — which is a hard exit from a subscription that sold it as maintenance.[1]
  • No cardiovascular outcome data of the kind the GLP-1s now carry, and contraindicated where blood pressure is uncontrolled.[1]

Sources

  1. [1] FDA prescribing information for phentermine hydrochloride tablets, via DailyMed
  2. [2] NADAC (National Average Drug Acquisition Cost), CMS, file of 19 August 2026
  3. [3] KFF, Medicaid coverage of and spending on GLP-1s, January 2026

Comparisons are computed from the fields on each card, not written by hand or by a model, so they change when the data does. Information only, not medical advice. halfrx may earn a commission from some links, which never changes what a comparison says.