BENZAMYCIN vs PREMPHASE (PREMARIN;CYCRIN 14/14)

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated October 8, 2026·How we rate

Possible drug interaction. BENZAMYCIN and PREMPHASE (PREMARIN;CYCRIN 14/14) 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	BENZAMYCIN	PREMPHASE (PREMARIN;CYCRIN 14/14)
Rating	74/100	New
Pharmacy pays	$0.05 /g	—
Type	RX	RX
Active ingredient	BENZOYL PEROXIDE AND ERYTHROMYCIN	ESTROGENS, CONJUGATED AND MEDROXYPROGESTERONE ACETATE
Manufacturer	Valeant Pharm Intl	Wyeth Pharms Inc
Dosage forms	Kit	Tablet
Drug class	—	—
Boxed warning	None	None

benzamycin premphase (premarin;cycrin 14/14)

Rating

74/100

New

Pharmacy pays

$0.05 /g

—

Type

Active ingredient

BENZOYL PEROXIDE AND ERYTHROMYCIN

ESTROGENS, CONJUGATED AND MEDROXYPROGESTERONE ACETATE

Manufacturer

Valeant Pharm Intl

Wyeth Pharms Inc

Dosage forms

Kit

Tablet

Drug class

—

Boxed warning

None

Frequently asked questions

What is the difference between Benzamycin and Premphase (Premarin;Cycrin 14/14)?

Benzamycin contains Benzoyl Peroxide and Erythromycin, while Premphase (Premarin;Cycrin 14/14) contains Estrogens, Conjugated and Medroxyprogesterone Acetate — 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.