FASTIN vs X-TROZINE

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 20, 2026·How we rate

Possible drug interaction. FASTIN and X-TROZINE 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	FASTIN	X-TROZINE
Rating	70/100	New
Pharmacy pays	~$2.54 /30	~$3.86 /30
Type	RX	RX
Active ingredient	PHENTERMINE HYDROCHLORIDE	PHENDIMETRAZINE TARTRATE
Manufacturer	Glaxosmithkline	Shire Richwood
Dosage forms	Capsule	Tablet
Drug class	Sympathomimetic Amine Anorectic	Sympathomimetic Amine Anorectic
Boxed warning	None	None
Treats	Obesity	Obesity

fastin x-trozine

Rating

70/100

New

Pharmacy pays

~$2.54 /30

~$3.86 /30

Type

Active ingredient

PHENTERMINE HYDROCHLORIDE

PHENDIMETRAZINE TARTRATE

Manufacturer

Glaxosmithkline

Shire Richwood

Dosage forms

Capsule

Tablet

Drug class

Sympathomimetic Amine Anorectic

Boxed warning

None

Treats

Obesity

Frequently asked questions

Which is cheaper, Fastin or X-Trozine?

Fastin costs pharmacies less to acquire — about $2.54 vs $3.86 for a 30-count supply, per the CMS NADAC survey. That gap is in the pharmacy's cost of goods, not necessarily in what you pay: your price is set afterwards by your insurer and the pharmacy.

What is the difference between Fastin and X-Trozine?

Fastin contains Phentermine Hydrochloride, while X-Trozine contains Phendimetrazine Tartrate — 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.