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Prescription requiredGlaxo Smithkline PharmaAnti-allergic

Dilosyn Sy

Methdilazine (4mg/5ml)

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Dilosyn Sy is used for dilosyn Syrup is used in the treatment of allergic conditions.

Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated September 2026

Licensed pharmacyPharmacist-verified order

Key details

Salt: Methdilazine (4mg/5ml)
Available variants: NA 100ML
Best price: ₹36 (₹0.36 per ml)
MRP: ₹38
Prescription: Required
Manufacturer: GLAXO SMITHKLINE PHARMA

Ordering notes

Delivery details are shown when the medicine is back in stock.
Returns & refunds: orders can be cancelled before dispatch; after dispatch, returns depend on the item category. Read the full policy

Composition of Dilosyn Sy

Dilosyn Sy contains Methdilazine (4mg/5ml). It belongs to the Antihistamine / leukotriene antagonist class of medicines.

Uses of Dilosyn Sy

Dilosyn Syrup is used in the treatment of allergic conditions.

Key benefits

  • Fast relief of sneezing
  • running nose and itching
  • Non-sedating options are available
  • Usually taken once a day

How Dilosyn Sy works

Dilosyn Syrup is an antihistaminic medication. It blocks the action of certain chemical messengers that are responsible for inflammation, congestion, itching, and other allergic reactions.

How to take Dilosyn Sy

Take this medicine in the dose and duration as advised by your doctor. Check the label for directions before use. Measure it with a measuring cup and take it by mouth. Shake well before use. Dilosyn Syrup may be taken with or without food, but it is better to take it at a fixed time.

Take it exactly as your doctor prescribed. Do not change the dose or stop early on your own.

Missed dose and overdose

If you miss a dose

Take it as soon as you remember. If your next dose is almost due, skip the one you missed — never take two doses together to catch up.

If you take too much

An overdose of this medicine can cause severe drowsiness, a fast heartbeat, confusion and, in children, agitation and fits. Do not wait for symptoms to appear — go to the nearest emergency department and take the pack or strip with you.

Side effects of Dilosyn Sy

Most side effects of Dilosyn Sy are mild and settle as the body adjusts. Reported side effects include:

  • Sleepiness

Stop the medicine and seek help immediately for a rash, swelling of the face or lips, wheezing or difficulty breathing. Tell your doctor about any side effect that persists or worries you.

Safety advice for Dilosyn Sy

PregnancyDilosyn Syrup may be unsafe to use during pregnancy.<br>Animal studies have shown adverse effects on the foetus, however, there are limited human studies. The benefits from use in pregnant women may be acceptable despite the risk. Please consult your doctor.
BreastfeedingNo information is available on the use of Dilosyn Syrup during lactation. Please consult your doctor.
AlcoholDilosyn Syrup may cause excessive drowsiness and calmness with alcohol.
DrivingMay cause drowsiness or affect your concentration. Do not drive until you know how it affects you.
KidneyThere is limited information available on the use of Dilosyn Syrup in patients with kidney disease. Please consult your doctor.
LiverThere is limited information available on the use of Dilosyn Syrup in patients with liver disease. Please consult your doctor.
Habit formingNo

Warnings and precautions

Older antihistamines cause marked drowsiness — do not drive or operate machinery until you know how this affects you. Tell your doctor promptly about any change in mood, sleep, agitation or unusual thoughts while taking montelukast; this is uncommon but recognised. This relieves the symptoms of an allergy; it does not treat the cause, and it is not a treatment for an acute asthma attack. Seek emergency care for swelling of the lips, tongue or throat, or difficulty breathing.

Do not take Dilosyn Sy if

Not for anyone with a known allergy to this medicine or to any ingredient in the pack. The sedating antihistamines are not suitable for very young children, or for people with glaucoma or an enlarged prostate, without medical advice.

Interactions with other medicines

Alcohol, sleeping tablets and other sedating medicines add to the drowsiness. Tell your doctor about all cold and cough preparations — many already contain an antihistamine.

How to store Dilosyn Sy

Store below 30°C in the original pack, away from direct sunlight and moisture. Keep out of the reach of children.

Expert advice for Dilosyn Sy

Taking it at bedtime reduces the impact of any drowsiness. Identify and avoid your triggers where you can — dust, pollen, cold air.

Manufacturer and class

Manufacturer:
GLAXO SMITHKLINE PHARMA
Therapeutic class:
Anti-allergic
Drug class:
Antihistamine / leukotriene antagonist

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Dilosyn Sy FAQs

What is Dilosyn Sy used for?
Dilosyn Sy is commonly used for Dilosyn Syrup is used in the treatment of allergic conditions. Always follow your doctor's advice, this information is for educational purposes and not a substitute for professional medical guidance.
What is the salt in Dilosyn Sy?
Dilosyn Sy contains Methdilazine (4mg/5ml). If you are allergic to any of these active ingredients or excipients, do not take this medicine and speak to your doctor first.
How should I take Dilosyn Sy?
Take this medicine in the dose and duration as advised by your doctor. Take it exactly as prescribed; do not change the dose or stop early without talking to your doctor.
How does Dilosyn Sy work?
Dilosyn Syrup is an antihistaminic medication.
Is Dilosyn Sy a prescription medicine?
Yes. Dilosyn Sy is a prescription-only (Rx) medicine. Upload a valid prescription from a registered medical practitioner during checkout. We cannot dispense it without a valid Rx.
What are the common side effects of Dilosyn Sy?
The side effects reported most often with Dilosyn Sy are Sleepiness. Most are mild and settle as the body adjusts; tell your doctor if any of them persist or worry you, and stop the medicine and seek help at once for a rash, swelling of the face or lips, or difficulty breathing.
Can Dilosyn Sy be taken during pregnancy?
Dilosyn Syrup may be unsafe to use during pregnancy.<br>Animal studies have shown adverse effects on the foetus, however, there are limited human studies. Always tell your doctor if you are pregnant, planning a pregnancy or breastfeeding before starting Dilosyn Sy.
Can I drink alcohol while taking Dilosyn Sy?
Dilosyn Syrup may cause excessive drowsiness and calmness with alcohol.
What if I miss a dose of Dilosyn Sy?
Take it as soon as you remember.
Is Dilosyn Sy habit forming?
No. Dilosyn Sy is not known to be habit forming when taken as prescribed.
How much does Dilosyn Sy cost on PingMeDoc Pharmacy?
Dilosyn Sy starts at ₹36 (MRP ₹38) on PingMeDoc Pharmacy. Available in NA 100ML. Final price is confirmed at checkout and may vary by variant and location.
Who manufactures Dilosyn Sy?
Dilosyn Sy is manufactured by GLAXO SMITHKLINE PHARMA. PingMeDoc Pharmacy sources medicines only from licensed manufacturers and distributors.
How is Dilosyn Sy delivered?
Dilosyn Sy is delivered across India via our licensed pharmacy partners. Standard delivery timelines are confirmed at checkout. Chennai customers can opt for chargeable same-city express delivery.

Dilosyn Sy, Quick facts

Salt
Methdilazine (4mg/5ml)
Best price
₹36 (₹0.36 per ml)
MRP
₹38
Prescription
Required (Rx)
Brand
GLAXO SMITHKLINE PHARMA
Manufacturer
GLAXO SMITHKLINE PHARMA
Therapeutic class
Anti-allergic
Drug class
Antihistamine / leukotriene antagonist
Habit forming
No
Variants
NA 100ML
Delivery
Standard across India

References

The information on Dilosyn Sy is compiled from the manufacturer's prescribing information and the sources below, and is reviewed by a registered medical practitioner. It does not replace advice from your own doctor.

  1. PingMeDoc clinical monograph library — compiled from Indian package inserts, the Indian Pharmacopoeia
  2. CDSCO schedules and standard pharmacology references. Reviewed for patient readability. This is general information, not a substitute for your doctor's advice.
  3. Central Drugs Standard Control Organisation (CDSCO), Ministry of Health & Family Welfare, Government of India, approved drug and schedule listings.
  4. National List of Essential Medicines (NLEM) 2022, Government of India.
  5. Manufacturer's package insert / prescribing information for Dilosyn Sy.
  6. World Health Organization, ATC/DDD classification and Model Formulary for the active ingredient.

Next steps

Safety disclaimer

Product information is for general awareness and does not replace professional medical advice. Always follow a clinician's guidance and upload a valid prescription when required.