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Optibac For Those On Antibiotics



For anyone looking to buy a natural friendly bacteria supplement to take alongside a course of antibiotics.

Information Leaflet


Who is Optibac For Those On Antibiotics for​?

For anyone looking to buy a natural friendly bacteria supplement to take alongside a course of antibiotics.

Key benefits

  • The three strains contained in this supplement are very well researched and have been clinically trialled alongside antibiotics
  • Each capsule provides 4.5 billion good bacteria and the billions count is guaranteed until end of expiry
  • With strains scientifically proven to pass through stomach acidity and survive to reach the gut, even when taken with antibiotics
  • Complements the flora naturally present in your gut
  • Easy to take on the go – no refrigeration required
  • Suitable from 1 year onwards. For those unable to swallow capsules, open and mix contents with cool drink/food
  • Recommended for daily use over the course of 10 days alongside a typical course of antibiotics
  • Can be used on an ongoing basis for those on long term antibiotics
  • Lactobacillus rhamnosus Rosell-11 & Lactobacillus acidophilus Rosell-52 have been shown to increase immune cell activity
  • Suitable for: women during pregnancy, vegans, vegetarians and gluten free for those with coeliac disease or a gluten intolerance
  • Free from artificial flavourings or colourings that may be found in other food & drinks containing live cultures
  • Update April 2021: now also with Bifidobacterium lactis Lafti B94 and providing 4.5 billion live cultures per capsule (previously 4 billion)
  • From the UK’s most trusted & recommended brand of friendly bacteria supplements. As determined in an independent survey of 1000 British women+.

Available in one pack size of 10 capsules – serving size: one capsule a day.

Customer Questions

All questions answered by probiotic experts Dr Kate Stephens PhD (Food and Microbial Sciences) BSc (Hons) Medical Microbiology and Kerry Beeson BSc (Nut. Med.) Nutritional Therapist.

Can I take live cultures with antibiotics?

Yes, it is absolutely fine, and advisable to take a friendly bacteria supplement whilst on antibiotics. When prescribed antibiotics, many individuals now choose to supplement their natural bacteria with a live cultures supplement. However, it’s best to select strains that have been extensively researched alongside this type of medication.

Which friendly bacteria are best to take with antibiotics?

It’s important to choose friendly bacteria strains that have been trialled alongside antibiotics and shown to reach the gut alive. Strains in For Those On Antibiotics have been shown to do so in numerous clinical trials, even when taken at the exact same time as antibiotic medication1. The strains in this supplement have been trialled at various life stages including in children2,3 and can be taken during long or short courses of antibiotics.

When should I take live cultures with antibiotics?

Like most of our range, we recommend that For Those On Antibiotics, should be taken at breakfast time. It’s fine to take this supplement with breakfast and alongside your antibiotics at the same time. If you take your antibiotics at a different time of day, then still take For Those On Antibiotics with breakfast. If you choose to take a different live cultures supplement, then note that it may be necessary to leave a two-hour gap from your medication dose. Ideally however, it’s best to take strains such as Lactobacillus acidophilus/helveticus Rosell-52, Lactobacillus rhamnosus Rosell-11 and Bifidobacterium lactis Lafti B94 which can be taken at the same time as your medicine.

How do friendly bacteria help with antibiotics?

When the correct strains are taken, friendly bacteria can support you whilst on the antibiotic medication4. It’s best to start taking For Those On Antibiotics right away at the start of your course but don’t worry if you miss a day or so at the beginning, just continue until the pack is complete. Many people like to continue taking live cultures once they have finished their course of medication, to maintain their support of the gut microbiome.

Uses / Instructions

Recommended use

Food supplement suitable for adults and children, from 1 year onwards, with the following recommendations:

  • Take 1 capsule daily with food, preferably with breakfast, every day during your antibiotic course and for a few days afterwards or until the pack has been completed.
  • Can be taken at the same time as antibiotics – strains in this product have been clinically trialled alongside antibiotics and found to reach the gut alive.
  • Drink plenty of water with your course of live cultures.
  • For anyone unable to swallow capsules, open and mix contents of the capsule with a cool meal or beverage.


  • Store in a cool, dry place below 25°C and out of direct sunlight.
  • Live cultures are not recommended for those with serious medical conditions e.g. those who are severely immunosuppressed, have pancreatitis, are in the ICU, have melaena, have a central venous catheter, infants with short bowel syndrome, or patients with open wounds following major surgery; unless under a doctor’s care.
  • Keep out of reach of children.
  • This is a dietary supplement and is not intended to diagnose, treat, cure or prevent any disease.
  • Probiotic supplements should not be used as a substitute for a healthy diet and lifestyle.
  • If you are taking any medications or have a serious medical condition, consult a doctor before use.
  • Optibac supplements will not cause dependency and may be used on an ongoing basis.

Side Effects

See packaging/patient leaflet for details.


  • Stabiliser: potato starch
  • Vegetarian capsule: hydroxypropyl methylcellulose
  • Live cultures: Lactobacillus rhamnosus Rosell-11, Bifidobacterium lactis Lafti B94, Lactobacillus acidophilus/helveticus Rosell-52
  • Anti-caking agent: vegetable magnesium stearate; antioxidant: ascorbic acid

Each capsule guarantees 4.5 billion live cultures.


  • Vegetarian
  • Vegan
  • No dairy
  • Gluten free
  • Yeast free
  • Suitable during pregnancy
  • Suitable during breastfeeding
  • GMO free
  • Free from artificial flavourings, colourings and preservatives
  • No chemicals or parabens
  • Sugar free

Following the taxonomic updates advised by a global team of scientists and published in April 2020, a reclassification has been proposed for the Lrhamnosus species. The L. rhamnosus strain in For Those On Antibiotics may therefore now also be known as Lacticaseibacillus rhamnosus Rosell-11.

Additional information

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