Ampicillin
$0.24
Ampicillin is a penicillin antibiotic used for infections of the chest, ear, urinary tract and gut. It works by killing the bacteria causing the infection.
Drug Information
8 reviews for Ampicillin
Ampicillin is a penicillin antibiotic. It is an older, close cousin of amoxicillin and is used to treat a range of infections caused by bacteria.
It is used for infections of the chest, ears, urinary tract and gut, and sometimes for more serious infections such as meningitis in hospital.
What is it used for?
- Chest and ear infections
- Urinary tract infections
- Some stomach and gut infections
How does it work?
Ampicillin stops bacteria from building their protective outer wall. Without this wall, the bacteria burst and die, which helps your body clear the infection.
This information is written in simple words to help you understand this product. It does not replace advice from your doctor or pharmacist.
Read these points before you start. If any of them apply to you, talk to your doctor or pharmacist first.
- Do not take it if you have ever had an allergic reaction to this antibiotic or to a similar one.
- Antibiotics only work on infections caused by bacteria. They do not help colds, flu or most sore throats, which are caused by viruses.
- Take the whole course your doctor gives you, even if you feel better after a few days. Stopping early can let the infection come back and make germs harder to treat in the future.
- Tell your doctor if you are pregnant, trying for a baby or breastfeeding.
- Never share your antibiotics or keep leftovers for another time.
- Do not take it if you are allergic to penicillin. Tell your doctor if you have ever reacted to any antibiotic, including cephalosporins such as cephalexin.
- Tell your doctor if you have glandular fever (mononucleosis), because this medicine is very likely to cause a rash in that case.
- Tell your doctor if you have kidney problems, as your dose may need to be lower.
- Tell your doctor or pharmacist about every other medicine, vitamin or herbal product you use.
- Keep this product out of the reach and sight of children.
Like all medicines, Ampicillin can cause side effects, but not everybody gets them.
Common side effects
- Feeling sick (nausea) or being sick
- Diarrhoea or loose stools
- Stomach ache or indigestion
- Mild itchy rash
- Thrush (a yeast infection) in the mouth or vagina
These are usually mild and often get better as your body gets used to it. Tell your doctor if they bother you or do not go away.
Stop using it and get medical help straight away if you notice:
- Severe diarrhoea that is watery or has blood in it, even up to 2 months after you finish the medicine
- Signs of an allergic reaction, such as a rash, swelling of the face, lips or tongue, wheezing or trouble breathing
- A skin rash that blisters or peels, with fever and sore mouth or eyes
This is not a complete list. If you notice anything unusual, ask your doctor or pharmacist.
- Take it exactly as your doctor tells you, usually 4 times a day, spaced evenly.
- Take it on an empty stomach, at least 30 minutes before a meal or 2 hours after a meal. Food makes it harder for your body to absorb.
- Swallow the capsule whole with a full glass of water.
- A common adult dose is 250 mg to 500 mg every 6 hours. Keep taking it until the course is finished.
If you miss a dose: Take it as soon as you remember. If it is nearly time for your next dose, skip the missed one and carry on as normal. Never take two doses at once to make up.
If you use too much: Contact your doctor, a poison control centre or your local emergency number straight away, even if you feel fine. Take the pack with you.
How to store it: Keep it in its original pack at room temperature (below 25°C / 77°F), away from heat, damp and direct sunlight. Do not use it after the expiry date.
- QWhy do I need to take Ampicillin on an empty stomach?
- A
Food lowers the amount of ampicillin your body absorbs, so it may not work as well. Taking it before meals helps it work properly.
- QWhat is the difference between Ampicillin and amoxicillin?
- A
They are very similar. Amoxicillin is absorbed better and can be taken with food and less often, so it is used more today. Your doctor will choose the best one for you.
- QCan I drink alcohol with Ampicillin?
- A
Alcohol does not stop it working, but it is best avoided while you are unwell because it can make stomach side effects worse.

Vivek Ivanov –
I wanted Ampicillin and this site made it simple to order. I got an order confirmation right away and updates after that. The outer box was discreet and the inside was well arranged. Will be using this site again.
Giovanni Kumar –
Ordering from this site was easy. Everything was packed carefully and nothing was damaged. My Ampicillin reached me without any delays. I am satisfied and will come back for my next order.
Ana Richardson –
Good value for the money. Everything was in order when I opened the box. My Ampicillin was packed with care, which I really noticed.
Daniela Morgan –
First time ordering Ampicillin online and this site made it easy. It was wrapped well enough that I had no worry about damage.
Christopher Lopez –
I used this site for my latest order and had no problems. No surprise fees at checkout, which I appreciated. The quality looked good to me.
Joshua Hamdan –
I ordered from here after comparing a few options. The whole ordering process felt easy and well organised. Great experience, I have already bookmarked the site.
Isabelle Ross –
Just received my Ampicillin and wanted to share how it went. I found the cost to be better than what I saw elsewhere. It was what I expected when I opened it. Highly satisfied with the service.
Henry Henderson –
My order went through without any problems. It was packed with care, which I really noticed. The cost was clearly shown before I paid, so no nasty surprises. Simple, quick and reliable.