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Gonablok 100 Capsule

Danazol (100mg)
Genuine
Authenticity Assured
Prescription
required
Gonablok 100 Capsule is used to treat various menstrual problems including painful or irregular periods, premenstrual tension (PMT), benign fibrocystic breast disease (painful breast disease), and a condition called endometriosis.

Written By Dr. Sakshi Jain, MS, BDS,
Reviewed By Dr. Sachin Gupta, MD Pharmacology, MBBS,
Last updated on 25 Nov 2025 | 03:05 PM (IST)
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10 capsules
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General Information

The content is shown in English
Gonablok 100 Capsule image
Gonablok 100 Capsule image
Gonablok 100 Capsule image
Gonablok 100 Capsule image

Product introduction

Gonablok 100 Capsule can be taken with or without food, but take it at the same time to get the most benefit. It should be taken as your doctor's advice. The dose and how often you take it depends on what you are taking it for. Your doctor will decide how much you need to improve your symptoms. Swallow the tablets whole with a glass of water. You should take this medicine for as long as it is prescribed for you.

The most common side effects of this medicine include weight gain, hair loss, voice changes, acne, and irregular menstrual cycle. If these bother you or appear serious, let your doctor know. There may be ways of reducing or preventing them. You should stop taking it if you become pregnant.

Before taking this medicine tell your doctor if you are pregnant or breastfeeding if you have ever had any problems with your blood circulation or have diabetes or migraine. Your doctor should also know about all other medicines you are taking as many of these may make this medicine less effective or change the way it works. Your doctor may perform blood tests regularly to check blood cells, liver, and thyroid are working properly.

Uses of Gonablok Capsule

Benefits of Gonablok Capsule

Treatment of Premenstrual syndrome (PMS)
Gonablok 100 Capsule may help reduce PMS symptoms such as mood swings, anxiousness, tiredness, bloating, breast tenderness and headaches. Lifestyle changes such as regular exercise, a healthy diet, getting plenty of sleep, and using relaxation techniques may also be helpful.
Treatment of Menstrual pain
Painful periods have a big impact on everyday life of a woman and there is not always an obvious cause. Gonablok 100 Capsule helps relieve pain and cramps during periods. You may have to use painkillers (NSAIDs) as well for rapid pain relief. Ask your doctor about which are most suitable.

Side effects of Gonablok Capsule

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 Gonablok
  • Hoarseness of voice
  • Hair loss
  • Weight gain
  • Acne
  • Abnormal hair growth on a women face and body
  • Voice change
  • Itchy scalp
  • Swelling
  • Sore throat
  • Irregular menstrual cycle

How to use Gonablok Capsule

Take this medicine in the dose and duration as advised by your doctor. Gonablok 100 Capsule may be taken with or without food.

How Gonablok Capsule works

Gonablok 100 Capsule works by reducing the levels of certain hormones like estrogen and progesterone in the body. This helps relieve symptoms of conditions like endometriosis, painful periods, and breast tenderness by lowering hormone-driven changes that cause discomfort.

Quick tips

  • Gonablok 100 Capsule helps treat endometriosis and heavy or painful periods.
  • It may also be used to relieve severe breast pain and tenderness in benign fibrocystic breast disease.
  • Use effective measures to avoid pregnancy during treatment with this medicine as it can be harmful to an unborn baby. 
  • Do not drink alcohol during treatment with this medicine as it can make you feel sick or short of breath. 
  • Inform your doctor immediately if you experience symptoms such as hair loss, marked increase in facial or body hair,  voice change, altered vision, severe headache and vomiting, stabbing pains and/or unusual swelling in one leg, sudden breathlessness or sudden chest pain, while taking this medicine.

Safety advice

Alcohol

Alcohol

UNSAFE
It is unsafe to consume alcohol with Gonablok 100 Capsule
Pregnancy

Pregnancy

UNSAFE
Gonablok 100 Capsule is highly unsafe during pregnancy. It can cause serious harm to the unborn baby, including birth defects and pregnancy loss. Do not use this medicine if you are pregnant or planning to become pregnant.
Breast feeding

Breast feeding

UNSAFE
Gonablok 100 Capsule is unsafe to use during breastfeeding. Data suggests that the drug may cause toxicity to the baby.
Driving

Driving

UNSAFE
Gonablok 100 Capsule may cause side effects that could affect your ability to drive.
Gonablok 100 Capsule may cause some side effects such as dizziness, a spinning feeling, and changes in eyesight. This may affect your driving ability.
Kidney

Kidney

CAUTION
Gonablok 100 Capsule should be used with caution in patients with kidney disease. Dose adjustment may be needed.
Use of Gonablok 100 Capsule may not be advised in patients with severe kidney disease.
Liver

Liver

CAUTION
Gonablok 100 Capsule should be used with caution in patients with liver disease. Dose adjustment may be needed.
Use of Gonablok 100 Capsule is not recommended in patients with the severe liver disease. Regular monitoring of liver function tests is advised while you are taking this medicine.

Interaction with drugs

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

Simvastatin (Oral Route)

Do not consume Simvastatin with Danazol. If concurrent use is essential, watch out for symptoms such as unexplained muscle pain, tenderness or weakness and consult your doctor if you experience them. They may adjust your doses as per the observations.
Moderate

Atorvastatin (Oral Route)

Do not consume Atorvastatin with Danazol. If concurrent use is essential, watch out for symptoms such as unexplained muscle pain, tenderness or weakness and consult your doctor if you experience them.
Moderate

Progesterone (Natural Micronized) (Oral Route)

It is recommended to use alternative methods (IUDs, depot, or barrier methods) of contraception. Danazol may reduce the efficacy of Progesterone (Natural Micronized).
Moderate

Carbamazepine (Oral Route)

Your doctor may monitor your treatment and adjust the doses as per the observations. Danazol may raise blood levels of Carbamazepine.
Moderate

Norethisterone (Oral Route)

It is recommended to use non-hormonal methods of contraception (like condoms) while taking Danazol. Danazol may reduce the efficacy of Norethisterone.

Frequently asked questions

The common side effects associated with Gonablok 100 Capsule are weight gain, hair loss, acne, visual disturbances, irregular periods, nausea, feeling tired and mood changes. If any of these side effects bother you, consult with your doctor.

Fact Box

Chemical Class

Estrane steroids

Habit Forming

No

Therapeutic Class

GYNAECOLOGICAL

Action Class

Androgen Derivatives- Endometriosis

References

  1. Chrousos GP. The Gonadal Hormones & Inhibitors. In: Katzung BG, Masters SB, Trevor AJ, editors. Basic and Clinical Pharmacology. 11th ed. New Delhi, India: Tata McGraw Hill Education Private Limited; 2009. pp. 717-18.
  2. 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. 351-53.
  3. Danazol. Bridgewater, New Jersey: Sanofi-Aventis U.S.; 2011. [Accessed 03 Apr. 2019] (online) Available from:
  4. Central Drugs Standard Control Organisation (CDSCO). [Accessed 04 Apr. 2019] (online) Available from:
  5. Danazol [Drug Label]. Bridgewater, New Jersey: Sanofi-Aventis U.S. LLC; 2011. [Accessed 25 Jul. 2024] (online) Available from:
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User feedback

Twice A Day
50%
Once A Day
30%
Thrice A Day
20%
Others
50%
Heavy menstrual bleeding
50%
Average
56%
Poor
44%
Headache
50%
Irregular menstrual cycle
50%
With food
100%
Expensive
100%
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Disclaimer

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: Win-Medicare Pvt Ltd
Address: 1309, 14th Floor, Madi Tower, 98, Nehru Place, New Delhi, Delhi 110019

Vendor Details

Country of origin: India
A licensed vendor partner from your nearest location will deliver Gonablok 100 Capsule. 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.

In case of any issues, contact us

Email ID: [email protected]
Phone Number: 0124-4166666
Address: 5th Floor Tower - B of the Presidency Building, 46/4 Mehrauli Gurgaon Road, Sector 14, Gurugram, Haryana-122001, India
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