DORYX MPC vs PFIZERPEN-AS

Independent side-by-side comparison.

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

Possible drug interaction. DORYX MPC and PFIZERPEN-AS 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	DORYX MPC	PFIZERPEN-AS
Rating	72/100	60/100
Pharmacy pays	$0.12 /mL	—
Type	RX	RX
Active ingredient	DOXYCYCLINE HYCLATE	PENICILLIN G PROCAINE
Manufacturer	Mayne Pharma	Pfizer
Dosage forms	Tablet, delayed release	Injectable
Drug class	Tetracycline-Class Drug	—
Boxed warning	None	None
Half-life	about 16 to 22 hours in healthy adults	—
Treats	Anthrax, Campylobacter Infections, Cholera	Actinomycosis, Anthrax, Botulism

doryx mpc pfizerpen-as

Rating

72/100

60/100

Pharmacy pays

$0.12 /mL

—

Type

Active ingredient

DOXYCYCLINE HYCLATE

PENICILLIN G PROCAINE

Manufacturer

Mayne Pharma

Pfizer

Dosage forms

Tablet, delayed release

Injectable

Drug class

Tetracycline-Class Drug

—

Boxed warning

None

Half-life

about 16 to 22 hours in healthy adults

—

Treats

Anthrax, Campylobacter Infections, Cholera

Actinomycosis, Anthrax, Botulism

Frequently asked questions

Which is better-rated, Doryx Mpc or Pfizerpen-As?

By our independent rating, Doryx Mpc scores higher — 3.6 vs 3.0 out of 5 for Pfizerpen-As. Ratings are based on FDA regulatory (recall-safety) data.

What is the difference between Doryx Mpc and Pfizerpen-As?

Doryx Mpc contains Doxycycline Hyclate, while Pfizerpen-As contains Penicillin G Procaine — 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.