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Grefex 120mg Tablet

Written By Dr. Anuj Saini, MMST, MBBS
Reviewed By Dr. Rajeev Sharma, MBA, MBBS
Last updated on 20 Feb 2026 | 07:29 PM (IST)
Grefex 120mg Tablet is an anti-allergy medicine used to relieve symptoms of allergic rhinitis, such as runny nose, sneezing, nasal congestion, itching, and watery eyes. It also helps treat skin allergies like urticaria (hives), reducing itching, redness, and swelling.
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Grefex 120mg Tablet is currently sold out
Same composition alternative:
Altiva 120mg Tablet
₹131₹208.1
Available alternative from Sun Pharmaceuticals
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Grefex 120mg Tablet
Grefex 120mg Tablet
strip of 10 tablets
₹106
₹115.31
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Same composition
Altiva 120mg Tablet
Altiva 120mg Tablet
strip of 10 tablets
Fexofenadine (120mg)
by Sun Pharmaceutical Industries Ltd
Get in 60 mins
₹131
₹11.1 per tablet

₹111

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₹1200

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General Information

Contains

Fexofenadine (120mg)

Marketer

Zee Laboratories

Storage

Store below 30°C
The content is shown in English
Grefex 120mg Tablet image
Grefex 120mg Tablet image

Product introduction

Grefex 120mg Tablet may be taken with or without food, in the dose and duration as advised by the doctor. The dose you are given will depend on your condition and how you respond to the medicine. You should keep taking this medicine for as long as your doctor recommends. Do not stop taking it without consulting your doctor.

The most common side effects are headache, drowsiness, dizziness, and nausea. Most of these are temporary and usually resolve with time. Please consult your doctor if any of these side effects do not resolve or persist for a longer duration.

Do not self-medicate or recommend your medicine to another person even if you see the similarity in symptoms. Consult your doctor to get the most benefit. Inform your doctor if you are suffering from any problems related to the kidneys, liver, or heart. Pregnant and breastfeeding mothers should not take this medicine without consulting a doctor.

Uses of Grefex Tablet

  • Treatment of Allergic rhinitis
  • Treatment of Chronic Idiopathic Urticaria

Benefits of Grefex Tablet

Treatment of Allergic rhinitis
Grefex 120mg Tablet helps relieve common symptoms of allergic rhinitis such as sneezing, runny nose, nasal irritation, itching, and watery eyes. Controlling the symptoms helps reduce discomfort and improve daily activities and sleep quality.
Treatment of Chronic Idiopathic Urticaria
Grefex 120mg Tablet helps reduce itching, redness, and raised skin welts (hives) associated with chronic idiopathic urticaria. When used regularly as prescribed, it helps control flare-ups, improves skin comfort, and reduces the impact of persistent hives on daily life.

Side effects of Grefex Tablet

Most side effects do not require any medical attention and disappear as your body adjusts to the medicine. Consult your doctor if they persist or if you’re worried about them
Common side effects of Grefex
  • Headache
  • Drowsiness
  • Dizziness
  • Nausea

How to use Grefex Tablet

Take this medicine in the dose and duration as advised by your doctor. Swallow it as a whole. Do not chew, crush or break it. Grefex 120mg Tablet may be taken with or without food.

How Grefex Tablet works

Grefex 120mg Tablet belongs to a class of medicines called antihistamines. It blocks the effects of a chemical called histamine, which is responsible for causing inflammation and its associated symptoms, such as itching, redness, swelling, and irritation.

All substitutes for Grefex 120mg Tablet

For information purposes only. Consult a doctor before taking any medicine.

etoFEX 120mg Tablet

by Leeford Healthcare Ltd
₹6.41/tablet
40% cheaper
<h3 class=bodySemiBold>etoFEX 120mg Tablet</h3>

Altiva 120mg Tablet

by Sun Pharmaceutical Industries Ltd
₹13.1/tablet
24% costlier
<h3 class=bodySemiBold>Altiva 120mg Tablet</h3>

Allegra 120mg Tablet

by Sanofi Consumer Healthcare India Limited
₹24.7/tablet
133% costlier
<h3 class=bodySemiBold>Allegra 120mg Tablet</h3>

Histafree 120 Tablet

by Mankind Pharma Ltd
₹11.3/tablet
7% costlier
<h3 class=bodySemiBold>Histafree 120 Tablet</h3>

Fexy 120 Tablet

by Lupin Ltd
₹22.7/tablet
114% costlier
<h3 class=bodySemiBold>Fexy 120 Tablet</h3>

Quick tips

  • Avoid drinking fruit juices (such as apple or orange) as this may affect the absorption of this medicine and cause more side effects.
  • It may cause nausea. Stick to simple meals, and do not eat rich or spicy food.
  • Avoid using antacids 30 minutes before or after taking this medicine. It can make it harder for your body to absorb this medicine.
  • Never give the medicine to someone who seems to be suffering from a similar illness. This medicine should be taken only if prescribed by a doctor.
  • Your doctor has prescribed Grefex 120mg Tablet to help relieve allergy symptoms such as itching, swelling and rashes.
  • As compared to other similar medications, it is much less likely to make you feel sleepy.
  • Be cautious while driving or doing anything that requires concentration as it can cause dizziness and sleepiness.
  • Do not drink alcohol while taking this medication as it may cause increased sleepiness.
  • Stop taking Grefex 120mg Tablet at least 3 days before taking an allergy test as it can affect the test results.

Safety advice

Alcohol

Alcohol

CONSULT YOUR DOCTOR
It is not known whether it is safe to consume alcohol with Grefex 120mg Tablet. Please consult your doctor.
Pregnancy

Pregnancy

CONSULT YOUR DOCTOR
The safety of Grefex 120mg Tablet during pregnancy has not been established. There are no adequate and well-controlled studies in pregnant women, and animal data on reproductive toxicity are insufficient. Your doctor will weigh the benefits and any potential risks before prescribing.
Breast feeding

Breast feeding

CAUTION
Grefex 120mg Tablet should be used with caution during breastfeeding. Breastfeeding should be held until the treatment of the mother is completed and the drug is eliminated from the body.
Because of low milk levels and lack of sleepiness, use of Grefex 120mg Tablet would not be expected to cause any adverse effects in breastfed babies.
Driving

Driving

SAFE
Grefex 120mg Tablet does not usually affect your ability to drive.
However, you should check that Grefex 120mg Tablet does not make you feel sleepy or dizzy before driving or operating machinery.
Kidney

Kidney

CAUTION
Grefex 120mg Tablet should be used with caution in patients with kidney disease. Dose adjustment may be needed.
May cause excessive sleepiness in patients with end stage kidney disease.
Liver

Liver

SAFE IF PRESCRIBED
Grefex 120mg Tablet is probably safe to use in patients with liver disease. Limited data suggest dose adjustment may not be needed.

Interaction with drugs

Taking Grefex with any of the following medicines can modify the effect of either of them and cause some undesirable side effects
Severe

Tepotinib (Oral Route)

Do not consume Tepotinib with Fexofenadine. If concurrent use is essential, please consult your doctor. Tepotinib may raise blood levels of Fexofenadine.
Moderate

Carbamazepine (Oral Route)

Your doctor may monitor the effects of Fexofenadine along with your overall treatment and adjust the doses as per the observations. Fexofenadine may increase the metabolism of Carbamazepine.
Moderate

Conivaptan (Injection Route)

Watch out for symptoms of Fexofenadine side effects such as headaches, excessive sleepiness, dry mouth, feeling sick or dizziness and consult your doctor if you experience them. They may adjust the doses as per the observations. Conivaptan may raise blood levels of Fexofenadine.
Moderate

Daclatasvir (Oral Route)

Watch out for symptoms of Fexofenadine side effects such as headaches, excessive sleepiness, dry mouth, feeling sick or dizziness and consult your doctor if you experience them. They may adjust the doses as per the observations. Daclatasvir may raise blood levels of Fexofenadine.
Moderate

Magaldrate (Oral Route)

Ensure a gap of at least 2 hours between taking Fexofenadine and Magaldrate.

Frequently asked questions

Grefex 120mg Tablet is used for treating seasonal allergic conditions such as hay fever. It helps to relieve allergies of the nose (allergic rhinitis), sneezing, runny nose, itching in the eyes, excessively watery eyes, etc.
Before starting treatment with Grefex 120mg Tablet, tell your doctor if you have any other health problems, like kidneys, heart or liver-related issues. This is because certain medical conditions may affect your treatment and you may even need dose modifications. Additionally, let your doctor know about all the other medicines you are taking because they may affect, or be affected by, this medicine. Also, inform your doctor if you are planning a baby, are pregnant, or breastfeeding.
If you forget a dose of Grefex 120mg Tablet, take it as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and take the next scheduled dose in the prescribed time. Do not double the dose to make up for the missed one as this may increase the chances of developing side effects.
Grefex 120mg Tablet should not be given to patients with known allergy to any other ingredients of this medicine. Signs of an allergic reaction may include an itchy skin rash, shortness of breath, and swelling of the face or tongue.
No. You should not stop taking Grefex 120mg Tablet even if you feel better unless your doctor tells you to stop taking it. This is because, stopping the medicine suddenly, without completing your full course of treatment may cause the returning of your symptoms and it can even worsen your condition. Consult your doctor if you are not sure.
No. Grefex 120mg Tablet is not an antibiotic. It is an anti-allergy medicine and helps to treat allergic conditions such as sneezing, stuffy or runny nose, hives, etc. On the other hand, antibiotics are used to treat infections caused by bacteria.
Yes, Grefex 120mg Tablet can cause dizziness (feeling faint, weak, unsteady or lightheaded) in some patients. If you feel dizzy or lightheaded, do not drive or use any machines. It is better to rest for some time and resume once you feel better.
Grefex 120mg Tablet is used for treating seasonal allergic conditions such as hay fever. It helps to relieve allergies of the nose (allergic rhinitis), sneezing, runny nose, itching in the eyes, excessively watery eyes, etc.
Before starting treatment with Grefex 120mg Tablet, tell your doctor if you have any other health problems, like kidneys, heart or liver-related issues. This is because certain medical conditions may affect your treatment and you may even need dose modifications. Additionally, let your doctor know about all the other medicines you are taking because they may affect, or be affected by, this medicine. Also, inform your doctor if you are planning a baby, are pregnant, or breastfeeding.
If you forget a dose of Grefex 120mg Tablet, take it as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and take the next scheduled dose in the prescribed time. Do not double the dose to make up for the missed one as this may increase the chances of developing side effects.
Grefex 120mg Tablet should not be given to patients with known allergy to any other ingredients of this medicine. Signs of an allergic reaction may include an itchy skin rash, shortness of breath, and swelling of the face or tongue.
No. You should not stop taking Grefex 120mg Tablet even if you feel better unless your doctor tells you to stop taking it. This is because, stopping the medicine suddenly, without completing your full course of treatment may cause the returning of your symptoms and it can even worsen your condition. Consult your doctor if you are not sure.
No. Grefex 120mg Tablet is not an antibiotic. It is an anti-allergy medicine and helps to treat allergic conditions such as sneezing, stuffy or runny nose, hives, etc. On the other hand, antibiotics are used to treat infections caused by bacteria.
Yes, Grefex 120mg Tablet can cause dizziness (feeling faint, weak, unsteady or lightheaded) in some patients. If you feel dizzy or lightheaded, do not drive or use any machines. It is better to rest for some time and resume once you feel better.

Fact Box

Chemical Class

Diphenylmethanes

Habit Forming

No

Therapeutic Class

RESPIRATORY

Action Class

Second-Generation H1 Antihistamines

References

  1. Briggs GG, Freeman RK, editors. A Reference Guide to Fetal and Neonatal Risk: Drugs in Pregnancy and Lactation. 10th ed. Philadelphia, PA: Wolters Kluwer Health; 2015. pp. 543-44.
  2. Chaves RG, Lamounier JA. Breastfeeding and maternal medications. J Pediatr (Rio J). 2004;80(5 Suppl):S189-S198. [Accessed 01 Apr. 2019] (online) Available from:
  3. Central Drugs Standard Control Organisation (CDSCO). [Accessed 01 Apr. 2019] (online) Available from:
  4. Fexofenadine hydrochloride [EMC SmPC]. Beverley, Hull: Dr. Reddy's Laboratories (UK) Ltd.; 2018. [Accessed 08 Oct. 2020]. (online) Available from:
  5. Drugs and Lactation Database (LactMed®) [Internet]. Bethesda (MD): National Institute of Child Health and Human Development; 2006. Fexofenadine. [Accessed 26 June 2023] (online) Available from:
  6. Fexofenadine Hydrochloride [Package Insert]. Salcete, Goa: Sanofi India Limited; 2020. [Accessed 26 June 2023] (online) Available from:
  7. National Health Services. Fexofenadine. [Last Reviewed: 14 Oct. 2021]. [Accessed 26 June 2023] (online) Available from:
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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: Zee Laboratories
Address: Uchani, G.T. Road, Karnal-132001 Haryana (INDIA)

Vendor Details

Country of origin: India

Lab tests offered by us

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