Ampicillin is a prescription medication used to treat several bacterial infections. It’s classified as a penicillin medication. The industry developed ampicillin because penicillin was starting to meet drug resistance in infections. It’s used for many bacterial infections such as throat, lung, sinus, urinary tract, reproductive organs, and gastrointestinal tract infections. It’s also used to treat meningitis. This medication works by killing the bacteria that are causing the infection.

Because this is an antibiotic, it doesn’t treat any infections other than bacterial ones. It can’t treat a viral infection like the flu or a cold. It’s essential to take your antibiotics until the entire course has been used. Never stop taking them partway through the prescribed course. This can lead to antibiotic-resistant bacteria.

This antibiotic is available as a capsule, liquid suspension, and powder reconstituted into an injectable liquid. Different strengths of these forms are available so the doctor can prescribe exactly what you need for your infection.

Precautions and Warnings of Ampicillin 

Don’t take this one if you’re allergic to this or any similar antibiotics. Similar ones include penicillin, dicloxacillin, amoxicillin (found in Amoxil), and nafcillin. Be sure to tell your doctor your complete medical history, including if you’ve ever had asthma, an allergy to a cephalosporin medication, hay fever, diabetes, diarrhea from antibiotic use, or kidney disease. This antibiotic might not suit you if you’ve had or currently have any of these conditions. If you’ve ever had infectious mononucleosis, make sure the doctor knows about it.

If you’re pregnant, notify your doctor. It’s also important to tell your doctor whether you’re breastfeeding. This medication shouldn’t be taken when breastfeeding, as it passes into breast milk. If you need to breastfeed, there may be a different medication that you can change to. Please don’t give this medication to a child unless the doctor prescribes it explicitly for them.

When you take this medication, it can cause your birth control medication to be less effective. To prevent pregnancy, you may need to use another birth control method while you take ampicillin.

If you have a vaccine that includes live bacteria, like a typhoid vaccine, this medication can make it less effective. It’s better to wait until you’re finished with your course of antibiotics before you get a vaccine with live bacteria.

Ampicillin Side Effects

Many side effects are possible when taking ampicillin. Many of these are mild and will go away as you continue to take the medication. Some of the most common side effects that patients see include a tongue that is black, swollen or looks hairy, a rash, vaginal discharge or itch, diarrhea, vomiting, nausea, and stomach pain. Tell your doctor about these side effects, but they generally don’t need to be medically treated unless they are very bothersome or worsen.

You may also come down with an overgrowth of a bacteria called C. difficile. This can happen when an antibiotic kills much of the gut bacteria and leaves the C. difficile variety to get overgrown. These bacteria can then produce two toxins that can cause illness. This can result in diarrhea that won’t go away, stomach pains, and mucus or blood in the stools. This condition requires medical treatment, so tell your doctor about your symptoms immediately.

You may also get a vaginal yeast infection from taking this medication. This can lead to a discharge and itching. You could also get oral thrust, an oral fungal infection. If you see white patches in the mouth, tell your doctor immediately.

It’s also important to watch for any allergic reactions to this medication. A severe allergic reaction is rare, but it can happen. You may be allergic to ampicillin if you get a serious rash, severe dizziness, difficulty breathing or swelling, and itching in your mouth or face. Seek immediate medical care to be treated for it.

Sometimes, this medication can lead to a mild and not bothersome rash. This isn’t a serious situation, but telling your doctor about it is still essential. It can be hard to know if you’re having an allergic reaction to it.

If you develop a severe skin reaction to ampicillin, you may get a purple or red rash with peeling and blistering. You may also have burning eyes, pain in your skin, a sore throat, and a fever. For all of the possible side effects when taking this medication, the risk is higher of developing them for older people.

There are also a lot of side effects that can be serious. Be sure to call your doctor immediately if you have any of these side effects:

  • Vomiting or nausea that won’t end
  • Dark urine
  • Easily bleeding or bruising
  • Abdominal or stomach pain, especially when severe
  • Fever or sore throat that lingers
  • Pale skin
  • Shortness of breath or lightheadedness
  • Cold feet and hands
  • Soreness and ulcers or blisters in the mouth
  • Fever and chills
  • Sore throat
  • Joint pain
  • Swollen glands
  • Mucus or blood in stools
  • Diarrhea that lingers

Ampicillin Drug Interactions

Ampicillin can interact with prescription medications, so your doctor knows everything you’re taking. It would be best if you also told them about any herbs or vitamins you take in case of an interaction. Taking ampicillin may cause a negative interaction if you take any tetracycline antibiotics or you take methotrexate.

When you’re taking ampicillin, it can cause some diabetic urine tests to show false positives. It can also interact with several other lab tests. Before you get lab tests, ensure your doctor and lab personnel know you’re taking this antibiotic.

Ampicillin Strengths and Dosages

This medication comes in capsule form, an oral suspension, and a powder made into an injection form. The capsules come in both 250 mg and 500 mg. The oral suspension comes in 125 mg or 250 mg. The powder comes in 125 mg, 250 mg, 500 mg, 1 g, 2 g, and 10 g strengths. The exact dosage you’re prescribed will depend on the reason for the prescription, your weight, and any other factors the doctor wants to consider.

Capsules: 250 mg, 500 mg
Oral suspension: 125 mg/5 mL, 250 mg/5 mL
Powder for injection form: 125 mg, 250 mg, 500 mg, 1 g, 2 g, 10 g

Questions & Answers of Ampicillin 

What is Ampicillin prescribed for?

It’s an antibiotic that can be used to treat a wide variety of bacterial infections. It kills bacteria to end the infection.

Can Ampicillin treat the flu?

No, it won’t treat the flu or any other viral infections.

What are the brand names of this medication?

There are many brand names under which this medication is sold. These include Amcil, Totacillin, Omnipen, Principen, Penbritin, Polycillin, and Pfizerpen.

Can Ampicillin cause side effects?

Yes, not everyone gets them, and they are often mild, though some may be severe. A mild rash, nausea, and vomiting are common side effects.

Can you take this medication while pregnant?

It’s best not to, but your doctor can weigh the possible risks against the benefits you may get by using ampicillin.

Can you take ampicillin if you have mono?

No, it isn’t recommended for anyone who has mononucleosis. If you currently have it, make sure your doctor knows about it.

Will my other medications interact badly with Ampicillin?

Several medications can cause an adverse interaction. Ensure your doctor knows everything you take before you start taking ampicillin.

IMPORTANT NOTE: The information provided here is for educational purposes only and is not intended to serve as medical advice, diagnosis, or treatment recommendations. It should not be taken as an endorsement of any specific medication or treatment. Individual health conditions and responses to treatment can vary greatly; therefore, this information should not be seen as a guarantee of safety, suitability, or effectiveness for any particular individual. Always consult with a healthcare professional for personalized medical advice and before making any decisions regarding your health or treatment plans.

Product was successfully added to your cart!