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Algirest M Syrup

Written By Dr. Subita Alagh, BDS
Reviewed By Dr. Sachin Gupta, MD Pharmacology, MBBS
Last updated on 25 Nov 2025 | 03:07 PM (IST)
Algirest M Syrup is commonly prescribed in children to treat symptoms of allergy such as runny nose, sneezing, itching, swelling, congestion, and watery eyes. It is also used in the treatment of hay fever and allergic skin conditions.
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Algirest M Syrup image
Algirest M Syrup image

Your child’s medicine at a glance

Give this medicine to your child at a fixed time before or after food in the prescribed dose, time, and way. For asthma, prefer giving Algirest M Syrup in the evening or 2 hours before physical activity. For allergy, it is best to give it either in the morning or in the evening, depending upon the time of onset of symptoms. In case your child has both, prefer giving it in the evening. If your child vomits within 30 minutes of taking this medicine, give the same dose again, but skip it if it’s already time for the next dose.

Your child may start to feel better after a few regular doses. However, you must still complete the prescribed dose to ensure maximum benefit. Moreover, stopping the medicine abruptly may worsen your child’s condition. This medicine may cause some minor and temporary side effects like vomiting, diarrhea, nausea, dizziness, body aches, rash, and headache. Usually, these episodes subside once your child’s body adapts to the medicine. However, in case these effects persist or start bothering your child, consult your child’s doctor without any delay.

Let your child’s doctor know if your child is already taking any medicines. Also, narrate your child’s complete medical history, including any prior episodes of allergy, heart problem, blood disorder, vascular disorders, birth defects, airway obstruction, lung anomaly, skin disorder, liver impairment, and kidney malfunction. This information is critical for dose alterations and in planning your child’s overall treatment.

Uses of Algirest M Syrup in children

Benefits of Algirest M Syrup for your child

Treatment of Allergic skin conditions
Algirest M Syrup is effective in treating allergic skin conditions with inflammation and itching such as urticaria. It works by reducing the actions of chemicals in the body that cause inflammation of the skin. It reduces the redness, rash, pain, or itchiness caused by the skin’s reaction to an irritant.
Treatment of Sneezing and runny nose due to allergies
Algirest M Syrup is a combination medicine that provides relief from symptoms such as blocked or runny nose, sneezing and itchy or watery eyes. This will make it easier for you to go about your daily activities. It rarely has any serious side effects and you may only need to take it on days you have symptoms. If you are taking it to prevent getting symptoms you should use it regularly to get the most benefit.
Treatment of Hay fever
Algirest M Syrup provides relief from symptoms such as blocked or runny nose, sneezing, and itchy or watery eyes. This will make it easier for your child to go about their daily activities. It rarely has any serious side effects and your child may only need to take it on days they have symptoms. If your child is taking it to prevent getting symptoms, it should be taken regularly to get the most benefit.

Side effects of Algirest M Syrup in children

Algirest M Syrup does not pose serious side effects and is well-tolerated by children. In case the side effects do occur, they’re likely to subside once the body adapts to the medicine. Consult your child’s doctor if these side effects persist or bother your child. The most common side effects include-
Common side effects of Algirest M
  • Nausea
  • Upper respiratory tract infection
  • Fever
  • Indigestion
  • Vomiting
  • Diarrhea
  • Dizziness
  • Headache
  • Skin rash
  • Body ache

How can I give Algirest M Syrup to my child?

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. Algirest M Syrup may be taken with or without food.

How Algirest M Syrup works

Algirest M Syrup contains Montelukast and fexofenadine. Together these two relieve sneezing and runny nose caused due to allergies. Fexofenadine is an antiallergic that blocks a chemical messenger (histamine) responsible for runny nose, watery eyes, and sneezing. Montelukast is a leukotriene antagonist that works by blocking another chemical messenger (leukotriene). This reduces inflammation (swelling) in the airways and nose and improves symptoms.

Quick tips

  • Never combine Algirest M Syrup with other cold and flu medicines as that may have side effects.
  • If you are giving Algirest M Syrup to your child for asthma or allergy, you need not give another dose to prevent exercise-induced breathing problems. In case of any confusion, consult your child’s doctor as soon as possible.
  • Make sure that you always have enough medicine.
  • Practice self-care tips:
    1. Abstain your child from coming in contact with allergens
    2. Encourage your child to wear a face mask and avoid dusty places
    3. Give plenty of fluids as it helps in thinning and loosening the mucus in the lungs.

Safety advice

Kidney

Kidney

CAUTION
Algirest M Syrup should be used with caution in patients with kidney disease. Dose adjustment may be needed.
Liver

Liver

SAFE IF PRESCRIBED
Algirest M Syrup is safe to use in patients with liver disease. No dose adjustment is recommended.
However, consult your child’s doctor in case of severe liver disease.

Frequently asked questions

Algirest M Syrup contains ingredients that can interfere with brain activity and may cause drowsiness, irritability, and behavioral problems.
Do not give high-fat meals and fruit juices to your child along with Algirest M Syrup as they may interfere with the absorption of this medicine. Make sure to keep a gap of at least 4 hours between giving this medicine and food to your child. This is done to significantly decrease any possible interaction between the two.
No. Do not mix cough and allergy medicines because they usually both contain similar ingredients. This may result in double dosing of the active ingredients, thereby causing serious side effects.
No, adhere to the dose as prescribed by your child’s doctor. Do not increase or decrease the dose by yourself as it can impact your child’s health. While increasing the dose may cause unwanted effects like sedation and depression, decreasing the dose or stopping it suddenly can result in a rebound reversal of all symptoms.
Algirest M Syrup should be stored at room temperature in a dry place, away from direct heat and light. Also, keep all medicines out of the reach and sight of children to avoid any accidental intake.
Algirest M Syrup causes mild drowsiness which can make your child sleepy. However, never give this medicine to your child to induce sleep. Forced sleep could mask any underlying sleep disorder like insomnia.
No, all symptoms may reappear on sudden withdrawal of Algirest M Syrup usually if taken for a long-term. It is advised to stop this medicine gradually under the guidance of your child’s doctor.

Fact Box

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Tata 1mg's sole intention is to ensure that its consumers get information that is expert-reviewed, accurate and trustworthy. However, the information contained herein should NOT be used as a substitute for the advice of a qualified physician. The information provided here is for informational purposes only. This may not cover everything about particular health conditions, lab tests, medicines, all possible side effects, drug interactions, warnings, alerts, etc. Please consult your doctor and discuss all your queries related to any disease or medicine. We intend to support, not replace, the doctor-patient relationship.

Marketer details

Name: Mac Millon Pharmaceuticals Pvt Ltd
Address: Address : 62, Vijay Nagar, Batala Road, Amritsar - 143036, Punjab

Vendor Details

Country of origin: India
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