penbritin
Penbritin (Ampicillin/Ampicillin Trihydrate) is a medication supplied as a for suspension and capsule.
Ampicillin/Ampicillin Trihydrate · by Wyeth Ayerst
Available as a generic: Ampicillin Trihydrate
Key facts
- Active ingredient
- Ampicillin/Ampicillin Trihydrate
- Form
- Capsule
- Strength
- AMPICILLIN/AMPICILLIN Trihydrate EQ 100MG BASE/ML · AMPICILLIN/AMPICILLIN Trihydrate EQ 125MG BASE/5ML · AMPICILLIN/AMPICILLIN Trihydrate EQ 250MG BASE/5ML
- Type
- Prescription (Rx)
- Brand or generic
- Brand-name
- Manufacturer
- Wyeth Ayerst
- FDA application
- NDA050019
- 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 Penbritin?
- pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Penbritin. 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 Penbritin?
- Penbritin is marketed by Wyeth Ayerst. You can see Wyeth Ayerst's full profile, rating, and other products on pharmaranks.
- Is Penbritin a brand-name or generic drug?
- Penbritin 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 Penbritin available over the counter?
- No. Penbritin 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 Penbritin come in?
- Penbritin is currently marketed as capsule, per the FDA's National Drug Code Directory.
- Is Penbritin FDA-registered?
- Penbritin is on record with the U.S. FDA under application number NDA050019. 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.
What people report to the FDA about AMPICILLIN/AMPICILLIN TRIHYDRATE
The FDA Adverse Event Reporting System (FAERS) collects reports from patients and clinicians. It holds 4 reports naming AMPICILLIN/AMPICILLIN TRIHYDRATE — the active ingredient in Penbritin, and the FDA flagged 75% of those reports as serious. The effects reported most often — leaving out reports about overdose, misuse or the condition being treated, which dominate the raw list for common medicines:
- acute kidney injury1 reports
- acute myocardial infarction1 reports
- acute respiratory distress syndrome1 reports
- blood bilirubin increased1 reports
- bradycardia1 reports
- brain injury1 reports
- cardiac failure congestive1 reports
- cardiogenic shock1 reports
Read these as a signal, not a rate. A report does not mean AMPICILLIN/AMPICILLIN TRIHYDRATE caused the effect — anyone can file one, and many describe people taking several medicines for several conditions. Crucially there is no denominator: FAERS does not record how many people took the drug, so these counts cannot be turned into “X% of patients” — a bigger number often just means a more widely used or more talked-about drug. Duplicates exist, and publicity drives reporting. For what is actually established, read the FDA label.
Source: openFDA drug/event (FAERS), retrieved September 25, 2026.
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