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OptiBac Probiotics For those on antibiotics £5.09 Was £5.65

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Click here to view the rest of the Optibac Probiotic range

An expert formula of Lactobacillus probiotics for people taking antibiotics (many of whom experience side effects such as thrush/diarrhoea). To be taken during & after an antibiotics course, this tops up the gut with friendly bacteria such as acidophilus.

20 Capsules | Two-a-day

What's it for?

To be taken during and after an antibiotic course to maintain healthy balanced levels of friendly bacteria

Who's it for?

Anyone who is taking a course of antibiotics (which kill off both the harmful and beneficial bacteria in the gut).

Each capsule provides

2 billion live probiotic cultures - daily dosage, 4 billion (2 capsules)

For those on antibiotics

For people who are taking antibiotics (e.g. amoxicillin, penicillin, tetracycline, doxycycline), or who have recently finished an antibiotic course, the probiotics in this OptiBac Probiotics formula are selected to maintain a good balance of friendly bacteria in the intestinal tract during and after the antibiotic course.

The balance between friendly and harmful bacteria in our gut is fragile and can easily be disturbed by factors such as stress, diet, ageing, and medication (especially antibiotics). Antibiotics do not distinguish between friendly and harmful bacteria and therefore kill off many probiotics in the gut, which should be replenished for good health.  OptiBac Probiotics For those on antibiotics promotes a healthy balance of good bacteria, thereby supporting health, digestion and immunity for patients taking antibiotics

How does For those on antibiotics work?

Lactobacillus acidophilus Rosell-52: acidophilus is a natural resident of the intestinal microflora; this specific probiotic strain has been well studied to survive gastric acidity and bile salts expected at mealtimes and to reach the intestines without damage. In addition, L. acidophilus Rosell-52 is tested to ensure adherence to the cell wall lining of the intestines; where it exerts beneficial effects in terms of inhibiting intestinal pathogens and supporting immune cells.

Lactobacillus rhamnosus Rosell-11 - a natural component of the friendly bacteria in the intestines; this species is one of the most studied in the probiotic world. L. rhamnosus Rosell-11 has been proven to resist bile and gastric acidity over pH 3 - therefore if taken at mealtimes (when pH is around 4), it will pass through the stomach without being damaged. The probiotic strain L. rhamnosus Rosell-11 is able to bind strongly to the intestinal cells and helps maintain a strong immune system.


For those on antibiotics can be given to adults and children (from 4 years upwards) with the following recommendations:-

  • Take two capsules daily with food, preferably breakfast, until antibiotics course is finished and preferably one week after, or as professionally directed.
  • Take probiotics separately from ingestion of antibiotics (at least one hour after antibiotics).
  • Continue taking OptiBac Probiotics For those on antibiotics until 20 capsule pack is completed, and add a second pack if the antibiotic treatment lasts more than one week.
  • For young children or any patient unable to swallow capsules, the content of the capsules can be mixed with a cold meal or beverage.


It is not recommended to give probiotics to severely immunosuppressed patients, infants with short bowel syndrome (SBS), post cardiac surgery patients, patients with pancreatitis, patients in the Intensive Care Unit (ICU) or patients with blood in the stool unless under a doctor's care.

Full ingredients

Maltodextrin, gelatin, Probiotic culture 'Lacidofil' (Lactobacillus rhamnosus Rosell-11, and Lactobacillus acidophilus Rosell-52), magnesium stearate, ascorbic acid.

We guarantee 2 billion live probiotic micro-organisms per capsule until the best before date. Daily dosage: 4 billion.


Like the rest of the range, For bowel calm does not require refrigeration.

Store out of direct sunlight.

  • Vegetarian
  • Vegan
  • No added sugars
  • Gluten free
  • Yeast free
  • Free from artificial colours
  • Suitable for pregnancy
  • Probiotic
  • Natural
  • Digestion
  • Immunity