CAYSTON vs THIOSULFIL

Independent side-by-side comparison.

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

Possible drug interaction. CAYSTON and THIOSULFIL 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	CAYSTON	THIOSULFIL
Rating	70/100	New
Pharmacy pays	—	—
Type	RX	RX
Active ingredient	AZTREONAM	SULFAMETHIZOLE
Manufacturer	Gilead Sciences Inc	Wyeth Ayerst
Dosage forms	Kit	Tablet
Drug class	—	—
Boxed warning	None	None
Treats	Cellulitis, Endometritis, Pseudomonas Infections	Urinary Tract Infections, Gram-Negative Bacterial Infections, Gram-Positive Bacterial Infections

cayston thiosulfil

Rating

70/100

New

Pharmacy pays

—

Type

Active ingredient

AZTREONAM

SULFAMETHIZOLE

Manufacturer

Gilead Sciences Inc

Wyeth Ayerst

Dosage forms

Kit

Tablet

Drug class

—

Boxed warning

None

Treats

Cellulitis, Endometritis, Pseudomonas Infections

Urinary Tract Infections, Gram-Negative Bacterial Infections, Gram-Positive Bacterial Infections

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Frequently asked questions

What is the difference between Cayston and Thiosulfil?

Cayston contains Aztreonam, while Thiosulfil contains Sulfamethizole — 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.