Probiotics After Antibiotics: Restoring Your Gut Balance

Why antibiotics affect your gut

Antibiotics are designed to kill harmful bacteria, but they cannot always tell the difference between the bacteria causing your infection and the helpful bacteria that live in your gut. This is why antibiotics sometimes upset digestion, causing bloating, loose stools or diarrhoea. Your gut microbiome — the community of trillions of microbes in your digestive tract — can take time to recover afterwards.

What probiotics are

Probiotics are live microorganisms, often bacteria or yeasts, that are intended to support a healthy balance of gut flora. They come as capsules, sachets, drinks and in fermented foods. The idea is to top up beneficial microbes while antibiotics are disturbing the natural balance, and to help things settle afterwards.

It is worth being realistic: the evidence on probiotics is mixed and depends on the specific strain, the situation and the person. Some people find them helpful for reducing antibiotic-related diarrhoea, while others notice little difference. They are generally considered safe for most healthy people, but they are not a cure-all.

How to use probiotics around an antibiotic course

If you choose to take a probiotic, a few practical tips can help:

• Space them apart. Taking your probiotic a couple of hours away from your antibiotic dose may help more of the live cultures survive.
• Continue afterwards. Many people keep taking a probiotic for a week or two after finishing the antibiotic to support recovery.
• Stay consistent. Like many supplements, probiotics tend to work best when taken regularly rather than occasionally.
• Choose a reputable product and follow the instructions on the pack.

Food first

You do not necessarily need a supplement to support your gut. Diet plays a big role:

• Fermented foods such as live yoghurt, kefir, sauerkraut and kimchi naturally contain beneficial microbes.
• Fibre-rich foods — vegetables, fruit, wholegrains, beans and lentils — feed the good bacteria already in your gut.
• Staying hydrated supports digestion, especially if you have had diarrhoea.

Who should be cautious

Probiotics are not suitable for everyone. People who are seriously ill, have a weakened immune system, or have certain medical conditions should check with a doctor before taking them. If you develop severe, watery or bloody diarrhoea during or after antibiotics, do not simply reach for a probiotic — this needs medical attention, as it can occasionally signal a more serious gut infection.

Don't forget the basics

Looking after your gut is helpful, but the most important rule with antibiotics remains: take them only when genuinely needed for a bacterial infection, and finish the course. Antibiotics do nothing for viruses, and unnecessary use fuels antibiotic resistance explained. For background, see bacterial infections explained.

When to seek advice

Speak to a pharmacist or doctor if digestive symptoms are severe or persistent, if you are unsure whether a probiotic is right for you, or if you have an underlying health condition. You can explore our antibiotics range or shop all for related products.

Supporting your gut with a sensible diet, plenty of fluids and, if you wish, a probiotic can make recovery from antibiotics more comfortable — just keep your expectations realistic and your course complete.

General information only — not medical advice. Always read the patient information leaflet and consult a doctor or pharmacist before starting any medication.