Hello US customer, you are currently shopping on the UK site. To ensure you are charged in the correct currency and receive accurate shipping costs, please switch to the US website and re-add your product to your basket.
Subscribe: Save 15% plus free standard UK delivery
Choose your favourite friendly bacteria supplement(s) and tell us how often you want us to deliver. We'll take care of the rest.
10 capsules |10 days' supply
A live cultures supplement that I recommend regularly for those taking or who have recently finished antibiotics.
For Those On Antibiotics is for anyone looking to buy a high-quality friendly bacteria supplement developed and proven especially to be taken alongside a course of antibiotics.
FREE UK delivery on orders over £40.
UK express - Monday to Friday delivery.
To compare our supplements for daily use scroll down
Perfect for anyone looking to buy a natural friendly bacteria supplement to take alongside a course of antibiotics.
I regularly use this product if my clients have to go onto antibiotics I have, on occasion, used this myself too - as well as S Boulardii. Great products from Optibac.
did the optibac antibiotics due to having a combination of very strong gram negative antibiotics. Optibac was great, kept all the nasty side effects away. Would highly recommend
I frequetly use " For those on antibiotics ". This product makes me feel better. I really see a change. I also contacted the customer service dpt to get some info. Very fast reply with all the needed information. Great prouct and great service !
We are the UK's most trusted & recommended brand of friendly bacteria supplements†.
† As determined in an independent survey of 1000 British women.
Proud winners of The Queen's Award for Enterprise 2019 in the international trade category.
Food supplement suitable for adults and children, from 4 years onwards, with the following recommendations:
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.
Gut health supplements are not intended to prevent, treat or diagnose any medical conditions. If taking probiotic supplements for gut health, note that these should not be used as a substitute for a varied and balanced diet and a healthy 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.
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.
Following the taxonomic updates advised by a global team of scientists and published in April 2020, a reclassification has been proposed for the L. rhamnosus species. The L. rhamnosus strain in For Those On Antibiotics may therefore now also be known as Lacticaseibacillus rhamnosus Rosell-11.
|No. Live Cultures||4.5 billion|
|Recommended Use||1 capsule daily|
Free UK Delivery over £40
Free standard UK delivery is automatically applied at the checkout when you spend £40.
Standard 2nd class: £2.50
Allow 4-10 working days (Monday - Friday) for delivery
1st class: £3.95
Allow 1-3 working days (Monday - Friday) for delivery
Express Next Day (Tracked): £6.95 (Dispatching Friday 30th December)
Order before 2pm for 1-2 working day delivery to most of the UK*. Orders placed on Friday will be delivered on Monday (next working day). Requires signature.
Please be aware of Christmas Bank holidays.
Shipments will be dispatched via DHL or FedEx, the service will be selected depending on the delivery location.
*Express delivery may exclude the Channel Islands, Herm Island, Isle of Man, Isle of Wight, Northern Irish postcodes BT18 & upwards, Sark, Scottish borders and offshore and a small number of remote mainland destinations as determined by our delivery courier.
We offer an excellent worldwide delivery service. For more details, please take a look at our delivery FAQ.
If you have changed your mind, you can return goods, at your cost, unopened within 14 days for refund or exchange, this does not affect your statutory rights.
All questions answered by probiotic experts Dr Kate Stephens PhD (Food and Microbial Sciences) BSc(Hons) Medical Biology and Kerry Beeson BSc (Nut. Med.) Nutritional Therapist
Yes! Taking live cultures with antibiotics is highly recommended. However, it’s important to select supplements such as Optibac For Those On Antibiotics, which contains strains extensively researched (1,2) alongside this type of medication and shown to reach the gut alive.
(1). Nagulesapillai V. Detection and Quantification of Strain Specific Probiotics in Clinical Fecal Samples of Healthy Adults on Antibiotic Treatment by Quantitative PCR. Poster presentation. 2015;1(1). ( 2). Maydannik V. et al. ‘Efficiency and safety of Lacidofil in children with antibiotic-associated diarrhoea caused by Clostridium difficile.’ Pediatrics, Obstetrics & Gynaecology. 2010;2(3):53-57.
Live cultures are best taken with food, ideally breakfast, when stomach acidity is closer to neutral. Antibiotics present an additional challenge for most delicate good bacteria, but if you take specific live cultures for antibiotics, such as those found in Optibac For Those On Antibiotics, they are hardy against the effects of this treatment (1) and continue to complement the gut microbiome throughout the course. This means you can still take your friendly bacteria supplement with breakfast as recommended, regardless of when you take your antibiotics! Taking these specific live cultures makes life easy - other live cultures supplements need to be taken at least two hours away from the medication.
(1). Nagulesapillai V. Detection and Quantification of Strain Specific Probiotics in Clinical Fecal Samples of Healthy Adults on Antibiotic Treatment by Quantitative PCR. Poster presentation. 2015;1(1).
Antibiotic medication can harm most delicate live cultures, so it’s best to choose specific friendly bacteria for antibiotics. Strains such as Lactobacillus acidophilus/helveticus Rosell-52, Lactobacillus rhamnosus Rosell-11 and Bifidobacterium lactis Lafti B94 have been shown to reach the gut alive, even when taken at the exact same time as short or long courses of antibiotic medication (1,2,3). These strains can be found in Optibac For Those On Antibiotics.
(1). Nagulesapillai V. Detection and Quantification of Strain Specific Probiotics in Clinical Fecal Samples of Healthy Adults on Antibiotic Treatment by Quantitative PCR. Poster presentation. 2015;1(1). (2). Maydannik V. et al. ‘Efficiency and safety of Lacidofil in children with antibiotic-associated diarrhoea caused by Clostridium difficile.’ Pediatrics, Obstetrics & Gynaecology. 2010;2(3):53-57. (3). Chernyshov P v. Randomized, placebo-controlled trial on clinical and immunologic effects of probiotic containing Lactobacillus rhamnosus R0011 and L. helveticus R0052 in infants with atopic dermatitis. Published online 2009. doi:10.3109/08910600903444234
|For Those On Antibiotics (10 capsules) - 10 capsules||Saccharomyces Boulardii (16 capsules) - 16 capsules||Every Day MAX (30 capsules) - 30 capsules||Every Day EXTRA (30 capsules) - 30 capsules|
|Suitability||Specific Digestive||Specific Digestive||General Digestive||General Digestive|
|Billions/CFU||4.5 billion||5 billion||75 billion||20 billion|