ONA-MAST vs WEGOVY

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 12, 2026·How we rate

Possible drug interaction. ONA-MAST and WEGOVY are different prescription medicines. Combining or switching between them can cause interactions — talk to a pharmacist or prescriber before making changes. This page is not medical advice.

Attribute	ONA-MAST	WEGOVY
Rating	New	70/100
Pharmacy pays	~$2.54 /30	—
Type	RX	RX
Active ingredient	PHENTERMINE HYDROCHLORIDE	SEMAGLUTIDE
Manufacturer	Mast Mm	Novo Nordisk
Dosage forms	Capsule, Tablet	Injectable, Tablet
Drug class	Sympathomimetic Amine Anorectic	Glp-1 Receptor Agonist
Boxed warning	None	Boxed warning
Half-life	—	about 1 week (roughly 7 days)
Treats	Obesity	Obesity, Overweight

ona-mast wegovy

Rating

New

70/100

Pharmacy pays

~$2.54 /30

—

Type

Active ingredient

PHENTERMINE HYDROCHLORIDE

SEMAGLUTIDE

Manufacturer

Mast Mm

Novo Nordisk

Dosage forms

Capsule, Tablet

Injectable, Tablet

Drug class

Sympathomimetic Amine Anorectic

Glp-1 Receptor Agonist

Boxed warning

None

Boxed warning

Half-life

—

about 1 week (roughly 7 days)

Treats

Obesity

Obesity, Overweight

Frequently asked questions

What is the difference between Ona-Mast and Wegovy?

Ona-Mast contains Phentermine Hydrochloride, while Wegovy contains Semaglutide — they have different active ingredients.

Ratings are based on FDA regulatory (recall-safety) data. This comparison is for general reference only — not medical advice. Always consult a licensed professional before choosing or switching a medication.