Doxt-SL
Doxt-SL is a capsule made by Dr. Reddy's that contains Doxycycline 100 mg + Lactic acid bacillus 5 billion spores. It combines Doxycycline: antibiotic (tetracycline) and Lactic acid bacillus: probiotic.
| Ingredient (salt) | Amount |
|---|---|
| Doxycycline | 100 mg |
| Lactic acid bacillus | 5 billion spores |
Doxycycline
What it is used for
Treats chest infections, acne, some fevers and is used to prevent malaria.
How it works
A tetracycline antibiotic for chest infections, acne, rosacea, Lyme disease, chlamydia, scrub typhus and malaria prevention.
How to take it
Swallow with a full glass of water while sitting or standing, and stay upright for 30 minutes (to protect the food pipe). Usually 100 mg once or twice a day.
Common side effects
- Nausea
- Sensitivity to sunlight (sunburn easily)
- Heartburn
Get medical help straight away if
- Pain on swallowing
- Severe headache with blurred vision
- Severe diarrhoea
Be careful
Take with a full glass of water and stay upright; avoid strong sun. Not for young children or pregnancy.
Other medicines and interactions
Iron, calcium, antacids, zinc and milk block absorption; separate by 2 to 3 hours. Can strengthen warfarin.
Pregnancy and breastfeeding
Not for pregnant women or children under 12 (it stains developing teeth). Short courses may be acceptable while breastfeeding; ask a doctor.
Lactic acid bacillus
What it is used for
Restores helpful gut bacteria, for example during diarrhoea or after antibiotics.
How it works
A lactic acid bacillus probiotic that may help restore gut bacteria, for example during or after antibiotics.
How to take it
Take as directed, usually once or twice a day; take it 2 to 3 hours apart from antibiotics.
Common side effects
- Wind
- Bloating
Get medical help straight away if
Fever or feeling very unwell, especially if your immune system is weak
Be careful
Generally safe.
Other medicines and interactions
Antibiotics can kill it; separate the doses.
Pregnancy and breastfeeding
Considered safe in pregnancy and breastfeeding.
Common questions
What is Doxt-SL?
Doxt-SL is a capsule by Dr. Reddy's containing Doxycycline 100 mg + Lactic acid bacillus 5 billion spores.
What is Doxt-SL used for?
Treats chest infections, acne, some fevers and is used to prevent malaria. Restores helpful gut bacteria, for example during diarrhoea or after antibiotics.
How should I take Doxt-SL?
Swallow with a full glass of water while sitting or standing, and stay upright for 30 minutes (to protect the food pipe). Usually 100 mg once or twice a day. Take as directed, usually once or twice a day; take it 2 to 3 hours apart from antibiotics. Always follow the dose your doctor or the pack gives.
What are the side effects of Doxt-SL?
Common side effects include: Nausea, sensitivity to sunlight (sunburn easily), heartburn, Wind, bloating. Get medical help straight away for: Pain on swallowing, severe headache with blurred vision, severe diarrhoea, Fever or feeling very unwell, especially if your immune system is weak.
Does Doxt-SL need a prescription?
Yes. In India it is a prescription (Schedule H) medicine, so a pharmacist should sell it only with a doctor's prescription.
Can I take Doxt-SL in pregnancy or while breastfeeding?
Not for pregnant women or children under 12 (it stains developing teeth). Short courses may be acceptable while breastfeeding; ask a doctor. Considered safe in pregnancy and breastfeeding.
What are the substitutes for Doxt-SL?
We have no other brand with exactly the same composition and strength in our list yet. Ask your pharmacist for an equivalent.
Sources and further reading
- Doxycycline: NHS · MedlinePlus
- Lactic acid bacillus: NHS · MedlinePlus
NHS (UK National Health Service) and MedlinePlus (US National Library of Medicine) are free, reviewed medicine guides. Brand names and doses there may differ from India.
Composition checked against pack details from large Indian online pharmacies. Last reviewed 31 October 2026. Written by Satya Babu.
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