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Ampicillin 500mg
Medically Reviewed by – Alfie Thornton, PharmD
Last Updated on 8 July 2026

Ampicillin 500mg

$0.61 $0.75
Ampicillin is a penicillin antibiotic that is used to treat bacterial infections such as bladder infection, E. coli infection, ear infection, pneumonia, and gonorrhea. This medication kills the bacteria by interfering with the growth of its cell wall. This medicine may also be used to treat other conditions as determined by your doctor.
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Ampicillin 500mg CouponCoupon DescriptionCoupon Expiry Date
SUNNY28Summer Spectacular Sale2026-07-31
Categories: Anti BioticsTag: Pills

What does Ampicillin 500mg Capsules treat?

Ampicillin 500mg Capsules is a penicillin antibiotic that is prescribed for the prevention and treatment of a wide range of bacterial infections such as meningitis, bladder infections, pneumonia, gonorrhea and stomach infections. Your physician may use this to treat other ailments based on their discretion.

Possible Side Effects

Ampicillin 500mg Capsules might have some side effects but it’s not possible to anticipate them. It does not have any major side effects and the minor ones that may occur are temporary. In rare cases, there might be major side effects and immediate medical attention must be sought. Some of the side effects could be irritation of mouth, tongue sores, diarrhea, nausea, vomiting, loss of appetite, stomach pain, itching and dizziness. This is not the complete list though. In case, there is a change in intensity of side effects or if any new side effects develop, make sure you consult your doctor.

Dosage Instructions

Follow the Ampicillin dosage prescribed by your physician. The dosage could vary based on individual patient requirements. Always follow your physician’s instructions or go by the directions on the prescription drug label. Make sure you have it with a whole glass of water. This must be taken on an empty stomach. Let your doctor know if you are pregnant or breast-feeding.

Missed a dose?

Take it immediately once you remember. In case, this time falls close to the next dosage, skip it and get back to the prescribed schedule. Never take a double dose unless your physician specifically directs you to do so.

Overdosed?

Don’t waste any time and seek immediate medical attention. Overdose symptoms that you might encounter are nausea, vomiting, diarrhea and seizures.

Drug Interactions

Drug interactions must be considered before starting to take any kind of drug. Drug interactions might happen either when Ampicillin is taken along with another drug or with particular foods. To prevent any kind of negative interaction, make sure you inform your doctor of any drugs you are taking including non-prescription medication, OTCs, health supplements like vitamins, minerals, herbal medicine, drinks with caffeine and alcohol, illegal drugs, smoking habits and so on which may increase the effect of Ampicillin. It may interact with:
  • Allopurinol
  • Gentamicin
  • Warfarin
  • Heparin
It may also interact with tetracycline aminoglycosides, antibiotics, anticoagulants and oral contraceptives. This is not an exhaustive list though. Appraise your doctor of any medical conditions that you are suffering from and your family history of medical ailments. It’s important that you do not stop or start taking any medicine without the consent of your physician.

FAQ's

Why Can’t You Eat with Ampicillin 500mg?

Ampicillin 500mg should be taken on an empty stomach — at least 1 hour before or 2 hours after meals. Eating with it can reduce absorption, making the antibiotic less effective. Food slows how quickly your body absorbs Ampicillin, so taking it on an empty stomach helps it work faster and fight bacteria better. Always follow your doctor’s timing and dosage instructions carefully.

How Long Does It Take for Ampicillin 500mg to Work?

Ampicillin 500mg usually begins working within 1 to 2 days of starting treatment. You may start feeling better after a few doses, but it’s important to finish the full course. Stopping early may allow bacteria to regrow or cause antibiotic resistance. If symptoms persist after several days, contact your doctor for a possible dose adjustment or alternate antibiotic.

Can Ulcer Patients Take Ampicillin 500mg?

Yes, ulcer patients can take Ampicillin 500mg, but only under medical advice. It’s sometimes used to treat ulcers caused by Helicobacter pylori bacteria. However, it may irritate the stomach lining in sensitive individuals. Always take it with plenty of water and follow your doctor’s instructions closely. Inform your physician about your ulcer history before starting the medicine.

Is Ampicillin 500mg Good for Tooth Infection?

Yes, Ampicillin 500mg can help treat tooth infections caused by bacterial buildup. It reduces swelling and pain by stopping bacteria from growing. However, it’s only effective if the infection is bacterial, not from gum irritation or injury. A dentist may also recommend drainage or other antibiotics depending on severity. Always complete the prescribed course for full recovery.

Can I Buy Ampicillin 500mg Online Over the Counter or Without Prescription?

Ampicillin 500mg is not available over the counter in the UK—it requires a prescription. However, you can buy it online from internationaldrugmart.com after an online consultation. Their licensed healthcare providers can assess your condition and, if appropriate, issue a prescription. This makes it easy and safe to get your medication delivered right to your doorstep without visiting a clinic.

Where can I buy Ampicillin 500mg online at a low price in UK?

You can buy Ampicillin 500mg online at a low price in UK from InternationalDrugMart. This trusted online pharmacy offers affordable rates, secure checkout, and reliable global shipping. Shop conveniently from home and get your treatment delivered to your doorstep. Save more on quality healthcare with InternationalDrugMart today.

Disclaimer

The health and medical information that we have provided are meant to supplement and not substitute the advice of your physician, pharmacists or other health care professionals. This does not suggest that usage of Ampicillin is safe, appropriate or effective for you. Always ensure that you take this or any other drug only after consulting your physician.

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