> Western Medicines > Lactobacillus


Used for: Gut microbiome
Chinese name:

What is Lactobacillus for?

Lactobacillus is a group of probiotic bacteria that naturally exists in the human intestine and vagina. It helps the digestion of food and to protect our gut and vagina from infections. People may take Lactobacillus to restore the gut microbiome (the bacteria environment in the gut) and treat stomach pain, allergies, and diarrhea. It is commonly used in people who are taking antibiotics because antibiotics kill the gut microbiome. Lactobacillus is also taken as a probiotic supplement by infants who receive breastfeeding and have crying or fussiness issues.

How to use it?

Lactobacillus is available in capsules, tablets and powder (in sachets) for oral use.


Diarrhea in people taking antibiotics
10-100 billion colony-forming units (CFU) per day. Start 2 days before antibiotics and stop after at least 3 days after antibiotics.


Hay Fever
2 billion colony-forming units daily for 7 weeks together with Loratadine 10mg daily for 5 weeks.


Stomach pain
20 million colony-forming units for 30 days.

What are the side effects of Lactobacillus?

Common side effects of Lactobacillus include bloating and flatulence.

Who should not take Lactobacillus?

  • People with compromised immune systems.
  • Patients with short bowel disease or ulcerative colitis.
  • People with damaged heart valves.

Pharmacist Tips:

  • Consult your doctor or pharmacist before taking Lactobacillus supplements, especially if you have chronic diseases.
  • Probiotics cannot replace any medications. If you are taking any medications, you should continue to take them even if you are taking Lactobacillus.
  • Do not take too much Lactobacillus to prevent disrupting your gut microbiome.
  • Maintain a healthy diet as you take Lactobacillus.

Common dosing schedule:
Try to take it at the same time each day.

If you are taking antibiotics, take probiotic supplements either during or two hours after taking the antibiotic.


This schedule is for reference only, adjustments may be made according to individual needs.


Some common medications Lactobacillus may interact with:

  • Lactobacillus has no known interactions with common medications.

Where to buy Lactobacillus in Hong Kong?

In Hong Kong, Lactobacillus is an over-the-counter medicine and can be purchased without a prescription from any retail outlet in Hong Kong. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.


For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at https://www.drugoffice.gov.hk

Need more information?

For detailed information about the use of Lactobacillus in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.

Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.

Brands in Hong Kong
Lacterol Fort
Available dosage
  • (Oral Powder)
  • (Capsules)
  • (Tablets)
Drug class
Sub class
Dietary Supplements
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Used for: Dietary supplementation
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Probiotics (Supplement)
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