Author Details
Written By
Reviewed By
MD (Pharmacology), MBBS
Last updated:
18 Feb 2020 | 05:25 PM (IST)
Want to know more?
Read Our Editorial Policy
Have issue with the content?
Report Problem

Neo-Mercazole 20 Tablet

Prescription Required
Store at room temperature (10-30°C)



Neo-Mercazole 20 Tablet belongs to a group of medicine called anti-thyroid agents. It is used in the treatment of hyperthyroidism. It reduces the amount of thyroid hormones produced by the thyroid gland.

Neo-Mercazole 20 Tablet may be used alone or in combination with other medicines. It can be taken with or without food. It should be taken exactly as prescribed by your doctor. Your doctor will decide the dose and how often you should take them. You should take this medicine regularly to get the most benefit from it. Do not stop taking the medicine even if you feel better unless the doctor tells you so.

Taking this medicine may cause few common side effects such as skin rash, headache, skin pigmentation, and muscle pain or weakness. Let your doctor know if any of these do not go away with time or worse.

Before using this medicine, inform your doctor if you have any problems with your liver or kidneys. You should also tell your doctor all the other medications you are taking. Pregnant and breastfeeding mothers should consult their doctors before using the medicine.

Uses of Neo-Mercazole Tablet

Side effects of Neo-Mercazole 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 Neo-Mercazole

  • Skin rash
  • Headache
  • Skin pigmentation
  • Pain
  • Joint stiffness
  • Nausea
  • Paresthesia (tingling or pricking sensation)
  • Hair loss

How to cope with side effects?

The occurrence of side effects varies from person to person. The following are a few ways of dealing with some of the common side effects. However, consult your doctor if these persist.

  • Coping with Skin rash
    There are many treatments for a wide range of skin problems. Avoid hot showers or baths because hot water can irritate the skin. Make sure to pat dry your skin after a bath or shower. Do not rub or scratch the affected area. Leave the skin exposed to the air as much as possible. Do not use perfumed soaps or deodorants. Water containing chlorine can make most skin problems worse, so avoid swimming. Avoid spicy foods, alcohol, tobacco smoke and caffeine as it may also make itching worse. Avoid excessive sun exposure. Always use sunscreen and protective clothing when outdoors. Moisturizers can be used regularly to soothe and hydrate the affected area. If it does not get better within a week, speak to a pharmacist or doctor.
  • Coping with Headache
    Make sure you rest and drink plenty of fluids. Rest in a quiet, dimly lit room. Do not sleep more than you normally would. Do not strain your eyes (for example by looking at a screen). Do not drink alcohol. Headaches are usually temporary and usually go away with time. But, if they last longer or get worse, ask your doctor to recommend a painkiller.
  • Coping with Pain
    Some people use herbal remedies, acupuncture and psychological therapies to manage pain. Using hot and cold compress can also help reduce the pain temporarily. Ask your doctor about suitable painkillers if it bothers you or does not go away.
  • Coping with Joint stiffness
    Try to keep your joints moving. Get some gentle exercise like walking or cycling. Using hot and cold treatments on the joints can help reduce pain temporarily. Concentrate on your breathing when you are in pain. Try to get enough sleep. Practice some relaxation techniques or mediation. Avoid smoking as it can worsen your condition. Losing weight can make a big difference to the amount of pain. Ask your doctor to recommend some suitable painkillers if the pain bothers you or does not go away.
  • Coping with Nausea
    You can help yourself by eating small, frequent meals rather than large ones and drinking plenty of fluids. Eat slowly. Avoid fatty, fried, spicy and very sweet foods. Eat cold or slightly warm food if the smell of cooked or cooking food makes you feel sick. Get plenty of fresh air. You could also try chewing ginger or drinking ginger tea. Eat bananas to replace potassium in your blood which can drop if you are sick (vomit). Use oral rehydration salts to replace vitamins and minerals lost through being sick. There are some medicines that can help you stop from feeling sick. Speak to your doctor if your condition does not improve.
  • Coping with Paresthesia (tingling or pricking sensation)
    Massaging the numb area can help improve blood flow and provide relief. Try warming your hands and feet if they are cold. In case they are hot, try cooling them down. Get plenty of rest as lack of proper sleep may worsen the condition. Reducing stress, avoiding alcohol, exercising regularly, and getting enough vitamins and nutrients through your diet can also make you feel better.
  • Coping with Hair loss
    Use gentle hair products such as baby shampoo. Use a soft brush and comb gently. Avoid using hairdryers, curling tongs or hair straighteners and pat your hair dry after washing. Do not color your hair. Protect your scalp by covering your head in the sun. It is necessary to not take the stress and eat a balanced, nutritious diet as it is vital for the health of your hair.

How to use Neo-Mercazole 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. Neo-Mercazole 20 Tablet may be taken with or without food, but it is better to take it at a fixed time.

How Neo-Mercazole Tablet works

Neo-Mercazole 20 Tablet is an anti-thyroid medication. It works by reducing the amount of thyroid hormones produced by the thyroid gland.

Safety Advice

It is not known whether it is safe to consume alcohol with Neo-Mercazole 20 Tablet. Please consult your doctor.
Neo-Mercazole 20 Tablet is unsafe to use during pregnancy as there is definite evidence of risk to the developing baby. However, the doctor may rarely prescribe it in some life-threatening situations if the benefits are more than the potential risks. Please consult your doctor.
Neo-Mercazole 20 Tablet is safe to use during breastfeeding. Human studies suggest that the drug does not pass into the breastmilk in a significant amount and is not harmful to the baby.
The American Thyroid Association also recommends monitoring babies for appropriate growth and development during routine pediatric check-ups.
Neo-Mercazole 20 Tablet may cause side effects which could affect your ability to drive.
There is limited information available on the use of Neo-Mercazole 20 Tablet in patients with kidney disease. Please consult your doctor.
Neo-Mercazole 20 Tablet should be used with caution in patients with liver disease. Dose adjustment of Neo-Mercazole 20 Tablet may be needed. Please consult your doctor.
Inform your doctor if you develop any signs and symptoms of jaundice while taking this medicine. Use of Neo-Mercazole 20 Tablet is not recommended in patients with severe liver disease.

Alternate Brands

For informational purposes only. Consult a doctor before taking any medicines.
Neo-Mercazole 20 Tablet
save 48%
Thyrocab 20mg Tablet
Corona Remedies Pvt Ltd
save 11%
Anti-Thyrox 20 Tablet
Macleods Pharmaceuticals Pvt Ltd
save 10%
Sterzole 20 Tablet
Captab Biotec
save 9%

Quick Tips

  • Neo-Mercazole 20 Tablet is used for the treatment of hyperthyroidism.
  • You may have to stop taking it for a while if you are also taking radio-iodine as a treatment for your overactive thyroid. 
  • It may affect the level of blood cells in your blood. Inform your doctor if you experience symptoms such as unexplained bruising or bleeding, sore throat, mouth ulcers, fever, or general illness.
  • Stop taking Neo-Mercazole 20 Tablet and Inform your doctor if you develop symptoms of liver damage such as abdominal pain, loss of appetite, darkened urine or yellowing of the eyes or skin.
  • Inform your doctor if you are pregnant, planning to conceive, or breastfeeding.

Fact Box

Chemical Class
Carbonylimidazoles Derivatives
Habit Forming

Interaction with Drugs

Taking Neo-Mercazole with any of the following medicines can modify the effect of either of them and cause some undesirable side effects
Brand(s): Altrom, Cenorol, Cgtrom
Brand(s): Cardisip, Digover, Caxin
Brand(s): Theopin, Zvtho, Tglo
Brand(s): Cofarin

Patient Concerns

Sir My mom have problem of thyroid and doctors are say you have to take ambulax and Neo-Mercazole 5 Sir can she take regularly ambulax medicine
Dr. Sfurti Mann
Internal Medicine
Propanalol with neomercazole is prescribed in hyperthyroidism
She is diabetic and the report of thyroid is attached.thyroid medicine is neo mercazole 5 thrice daily
Dr. Sanjay Bhatt
You need to continue medicine as priscribed by your doctor. Try to control sugar level in normal limits
Do you have any questions related to Neo-Mercazole 20 Tablet ?

User Feedback


Q. Can I just stop taking Neo-Mercazole?

No, you should not stop taking Neo-Mercazole even if you start feeling better. You may have to take it for several months depending on your investigations. The duration of the treatment will continue till the thyroid hormone levels return to normal. This duration may vary from six months to 18 months. Your doctor will decide when the treatment should be stopped.

Q. How long does Neo-Mercazole take to work?

You may start feeling better within 1-3 weeks of starting Neo-Mercazole. However, it usually takes 4-8 weeks to see the full benefits of the treatment.

Q. Can Neo-Mercazole cause hair loss?

Neo-Mercazole may cause hair loss but not in everyone. It has been seen that on discontinuing Neo-Mercazole or replacing Neo-Mercazole with another medicine, there is improvement and hair loss reverses.

Q. Who should not take Neo-Mercazole?

You should not take Neo-Mercazole if you have serious liver disorder or serious blood disorder. You should also avoid taking this medicine if you are pregnant or are allergic to Neo-Mercazole or any of the ingredients present in it Neo-Mercazole.

Q. My sister is taking Neo-Mercazole for overactive thyroid gland. She frequently gets sore throat and stops and restarts the treatment again and again. Is there any risk if she continues to take Neo-Mercazole when she has sore throat?

Very rarely, Neo-Mercazole interferes with the bone marrow and causes a drastic drop in white blood cells. These white blood cells are a part of the body's defense against bacterial infections, such as sore throats. So, a sore throat can sometimes be the first clue that Neo-Mercazole is affecting the bone marrow. Your sister should contact her doctor and get a blood test. If blood test shows her white blood cell count to be normal, then she can continue Neo-Mercazole. If not, she should stop the treatment after consulting the doctor.

Q. How does Neo-Mercazole affect children?

The effectiveness and side effects of Neo-Mercazole in children are more or less the same as in adults. Neo-Mercazole should not be used in children less than 2 years of age.

Q. I have been taking warfarin, so will it have any effect on Neo-Mercazole therapy?

If you have started taking Neo-Mercazole, the dose of warfarin may need adjustment. You should consult your doctor and get your bleeding time checked so that the dose can be adjusted according to the results of the investigations.

Q. Even if my liver is normal, can Neo-Mercazole cause any liver problems?

Yes, Neo-Mercazole may cause liver problems, though not in everyone. A very common side effect of Neo-Mercazole can be yellowing of skin and eyes (jaundice). It may also cause abnormal liver function tests, hepatitis, etc. If you notice jaundice, you should discontinue Neo-Mercazole and seek immediate medical advice.

Q. If I am planning my pregnancy, can I continue taking Neo-Mercazole?

No, it is advisable not to take Neo-Mercazole during pregnancy as it may cause abnormalities in your baby. You should consult your doctor because if your thyroid hormone levels are not controlled, chances of birth defects in your baby are much more. In case Neo-Mercazole is the only option for you, your doctor will prescribe the lowest possible dose, which will be regulated according to your condition. You can stop it 3-4 weeks before delivery to reduce chances of complications in your baby.

Related Products

Want to share the information?


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 all possible side effects, drug interactions or warnings or alerts. 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.


  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. p. 205.
  2. Carbimazole. London, UK: Amdipharm UK Limited; 2008 [revised 30 Jul. 2014]. [Accessed 04 Apr. 2019] (online) Available from:External Link
  3. Chaves RG, Lamounier JA. Breastfeeding and maternal medications. J Pediatr (Rio J). 2004;80(5 Suppl):S189-S198. [Accessed 4 Apr. 2019] (online) Available from:External Link

Manufacturer/Marketer Address

16th Floor, Godrej BKC, Plot – C, “G” Block, Bandra-Kurla Complex, Bandra (East), Mumbai – 400 051, India
A licensed vendor partner from your nearest location will deliver Neo-Mercazole 20 Tablet. Once the pharmacy accepts your order, the details of the pharmacy will be shared with you. Acceptance of your order is based on the validity of your doctor's ℞ and the availability of this medicine.
MRP1063.6  Get 15% OFF
Best Price
100 tablets in 1 bottle
Add To Cart
Additional offers
Paytm: Pay with Paytm and get cashback up to ₹500. Minimum cashback to be won is ₹50. Valid only for new Paytm customers with minimum order value of ₹1000 from 1st August to 31st August, 2020.
Show more show_more


Orders Delivered
Get the link to download App

All products displayed on 1mg are procured from verified and licensed pharmacies. All labs listed on the platform are accredited


1mg uses Secure Sockets Layer (SSL) 128-bit encryption and is Payment Card Industry Data Security Standard (PCI DSS) compliant


Find affordable medicine substitutes, save up to 50% on health products, up to 80% off on lab tests and free doctor consultations.

India's only LegitScript and ISO/IEC 27001 certified online healthcare platform
Know More About 1mgdownArrow
Access medical and health information

1mg provides you with medical information which is curated, written and verified by experts, accurate and trustworthy. Our experts create high-quality content about medicines, diseases, lab investigations, Over-The-Counter (OTC) health products, Ayurvedic herbs/ingredients, and alternative remedies.

Order medicines online

Get free medicine home delivery in over 1000 cities across India. You can also order Ayurvedic, Homeopathic and other Over-The-Counter (OTC) health products. Your safety is our top priority. All products displayed on 1mg are procured from verified and licensed pharmacies.

Book lab tests

Book any lab tests and preventive health packages from certified labs and get tested from the comfort of your home. Enjoy free home sample collection, view reports online and consult a doctor online for free.

Consult a doctor online

Got a health query? Consult doctors online from the comfort of your home for free. Chat privately with our registered medical specialists to connect directly with verified doctors. Your privacy is guaranteed.