Question 1

Are Saxenda and Zepbound the same drug?

Accepted Answer

No. Saxenda is liraglutide and Zepbound is tirzepatide — different molecules, and they work differently: GLP-1 receptor agonist (mono) against Dual GIP / GLP-1 receptor agonist. Results with one do not predict results with the other.

Question 2

Is Saxenda or Zepbound cheaper?

Accepted Answer

On the manufacturers' own cash pricing: Saxenda at About $1,400/mo retail, with no manufacturer cash program, Zepbound at $349-$499/mo through the manufacturer's direct-pay vials. ⚠ That is the list-price comparison, and it is not what most people pay. What you actually pay depends on whether your plan covers it, which formulary tier it sits in, and whether you have met your deductible — and for many people the honest comparison is between an insured copay and a cash-pay compounded alternative rather than between these two figures.

Question 3

How is each one taken?

Accepted Answer

Saxenda: Once-daily subcutaneous injection (5-step titration to 3.0 mg). Zepbound: Once-weekly subcutaneous injection (6-step titration to 15 mg). Worth weighing honestly against your own habits — the best drug for you is partly the one you will still be taking in eight months, and a dosing routine that does not fit a life gets abandoned.

Question 4

What does a compounded version of each actually cost?

Accepted Answer

Across the 556 sellers in this register, the cheapest standing monthly cash prices we hold are liraglutide from $160 a month and tirzepatide from $99 a month. ⛔ A compounded preparation is not the approved product: no agency has reviewed that specific preparation for safety, effectiveness or manufacturing quality, and the legal ground under compounding these molecules narrowed once the shortages closed. The price gap is real and so is the difference in oversight.

Question 5

Can I switch from Saxenda to Zepbound?

Accepted Answer

Yes, with a prescriber. Expect to re-titrate from the bottom of the new drug's ladder rather than starting where you left off: these are different molecules and tolerance to one does not transfer to the other. Both the old drug's washout and the new drug's schedule apply.

Question 6

Which one should I ask for?

Accepted Answer

That is a prescriber's call, and anyone answering it from a table is guessing. What a page like this can do is tell you what the trials measured, what the manufacturers charge, and where the evidence is still missing, so the conversation starts from the record rather than from an advertisement.

Field	Saxenda	Zepbound
Mechanism	GLP-1 receptor agonist (mono)	Dual GIP / GLP-1 receptor agonist
Pivotal weight-loss trial	−8.0% body weight / 56 wk (SCALE Obesity, 3.0 mg)	−20.9% TBWL / 72 wk (SURMOUNT-1, 15 mg)
Dosing frequency	Once-daily subcutaneous injection (5-step titration to 3.0 mg)	Once-weekly subcutaneous injection (6-step titration to 15 mg)
FDA-approved indications	Chronic weight management in adults; adolescents 12-17 with BMI ≥95th percentile	Chronic weight management (adults); moderate-to-severe obstructive sleep apnea (adults)
Youngest approved age	12 and over	Adults only, 18 and over
Whether a trial proved it prevents heart attacks and strokes	None at this dose. LEADER tested liraglutide at 1.8 mg for diabetes, not the 3.0 mg used here	None yet — SURPASS-CVOT does not report until 2027
How long it takes to leave your system	Half-life about 13 hours, so it is effectively gone in 2 to 3 days	Half-life about 5 days. The label advises stopping at least one month before a planned pregnancy
What it costs if you pay cash	About $1,400/mo retail, with no manufacturer cash program	$349-$499/mo through the manufacturer's direct-pay vials

Saxenda vs Zepbound: The Oldest and the Strongest

The verdict

Side-by-side comparison

What each one costs in the compounded market

Frequently asked questions