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principen '500'

Principen '500' (Ampicillin/Ampicillin Trihydrate) is a medication supplied as a capsule.

Ampicillin/Ampicillin Trihydrate · by Apothecon

Available as a generic: Ampicillin Trihydrate

Not yet rated· sourced from the FDA label
Rated against independent regulatory sources·Last updated June 7, 2026·How we rate
Verified againstopenFDANIH DailyMedRxClass

Key facts

Form
Capsule
Strength
AMPICILLIN/AMPICILLIN Trihydrate EQ 500MG Base
Type
Prescription (Rx)
Brand or generic
Brand-name
Manufacturer
Apothecon
FDA application
NDA050056
Availability
Discontinued (per FDA)

Dosage forms

Capsule

The forms currently marketed in the U.S., per the FDA National Drug Code Directory.

Ways to save

Ask for the generic

Same active ingredient, far cheaper. Is there a generic? →

Request a 90-day supply

Bulk fills usually lower the per-dose price vs monthly refills.

Use copay cards

Manufacturer copay cards & patient-assistance programs — especially for brand drugs.

Compare alternatives

A same-class option may cost less. See alternatives →

Frequently asked questions

Is there a coupon or discount for Principen '500'?
pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Principen '500'. To pay less, ask your prescriber or pharmacist whether a generic equivalent exists, check the manufacturer's copay/savings card and patient-assistance program, and compare a pharmacy discount card against your insurance copay. Prices vary by pharmacy, insurance, and location, so always confirm at the counter. This is general reference, not medical or financial advice.
Who makes Principen '500'?
Principen '500' is marketed by Apothecon. You can see Apothecon's full profile, rating, and other products on pharmaranks.
Is Principen '500' a brand-name or generic drug?
Principen '500' is a brand-name product with the active ingredient Ampicillin/Ampicillin Trihydrate. Lower-cost generic equivalents containing Ampicillin/Ampicillin Trihydrate are available — ask your pharmacist.
Is Principen '500' available over the counter?
No. Principen '500' is a prescription (Rx) medication in the US — you need a prescription from a licensed clinician (in person or via telehealth); it isn't sold over the counter. For some conditions there are OTC alternatives — ask your pharmacist.
What forms does Principen '500' come in?
Principen '500' is currently marketed as capsule, per the FDA's National Drug Code Directory.
Is Principen '500' FDA-registered?
Principen '500' is on record with the U.S. FDA under application number NDA050056. You can verify this on its official FDA label.

Information is sourced from public FDA regulatory data. Provided for general reference only — not medical advice. Always consult a licensed professional and the current prescribing information.

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