| Package | Dosage | Price | Price per Dose | |
|---|---|---|---|---|
| Dosage: 250mg | ||||
| 360 pill | 250mg | $293.46 | $0.81 | |
| 180 pill | 250mg | $175.43 | $0.97 | |
| 90 pill | 250mg | $132.37 | $1.47 | |
| 60 pill | 250mg | $102.06 | $1.71 | |
| 30 pill | 250mg | $68.57 | $2.28 | |
| Dosage: 500mg | ||||
| 360 pill | 500mg | $322.17 | $0.89 | |
| 120 pill | 500mg | $161.08 | $1.34 | |
| 90 pill | 500mg | $146.72 | $1.63 | |
| 60 pill | 500mg | $116.42 | $1.95 | |
| 30 pill | 500mg | $71.76 | $2.39 | |
Principen Description
What is Principen?
Principen is a brand name for ampicillin, an older penicillin antibiotic. In the United States it is available as Principen and as a generic ampicillin product.
Ampicillin fights many common bacteria that cause infections such as sinusitis, bronchitis, urinary tract infections, and ear infections. It is not effective against viruses like colds or flu.
Your clinician will decide if this medicine is right for you based on your symptoms, allergy history, and test results. Do not use it without a prescription.
How Principen is used in the United States
Principen comes in capsules, oral suspension, and injectable forms. The capsule is typically taken by mouth with a full glass of water.
In the United States, dosing depends on the infection and the patient. Adults often take multiple doses daily for several days. Children receive a weight-based amount.
Always finish the prescribed course even if you feel better. Stopping early can allow bacteria to continue growing.
Online pharmacy service in the USA
Online pharmacies in the USA must require a valid prescription and verify it with a licensed prescriber.
A trusted online pharmacy will provide active, licensed pharmacists to answer questions. You should receive patient information leaflets and dosing guidance.
Shipments are usually packaged with precautions for temperature and freshness. Check the label to confirm the medicine is the correct strength.
Safety, allergy and side effects
Common side effects include nausea, diarrhea, and mild skin rashes. These are usually mild and pass with time.
Serious allergic reactions can occur with penicillins. Seek urgent care if you notice trouble breathing, swelling, or hives.
Tell your pharmacist about any allergies and other medicines you take. Combining certain drugs with ampicillin can raise safety risks.
Interactions and cautions
Ampicillin can interact with methotrexate, warfarin, and some birth control methods. It may alter how these medicines work.
Your kidney function may affect dose needs. People with kidney problems require medical supervision.
If you are pregnant or breastfeeding, discuss risks with your clinician. Do not start a new antibiotic without confirmation.
Storage and local differences
Store at room temperature away from heat and moisture. Do not freeze the suspension.
Keep the bottle closed when not in use and discard after the expiry date. Do not reuse the suspension if it looks clumpy or discolored.
In the US, online pharmacies may offer generic ampicillin at lower prices. Brand versions like Principen are sometimes more expensive.
Patient review and real-world experience
Patients often report modest improvements within 48 to 72 hours when the infection responds to therapy.
Some people experience stomach upset. Taking with food can help; however, some suspensions may require an empty stomach.
If symptoms worsen or do not improve after a few days, contact your clinician. A simple allergy or resistance may require a different antibiotic.