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GestoFIT 100 Injection

Progesterone (Natural Micronized) (100mg)

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GestoFIT 100 Injection is a natural female hormone important for regulating ovulation (release of an egg from a woman's ovary) and menstruation. It helps restore menstrual cycles in women whose periods have stopped. It is also used in the treatment of infertility.

Written By Dr. Mayank, Pharm.D,
Reviewed By Dr. Mekhala Chandra, MD, MBBS,
Last updated on 13 Nov 2025 | 03:50 PM (IST)

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1 ml Injection

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General Information

Contains

Progesterone (Natural Micronized) (100mg)

Marketer

Alembic Pharmaceuticals Ltd

Storage

Store below 25°C

The content is shown in English

Product introduction

GestoFIT 100 Injection is generally given by a healthcare professional and should not be self-administered at home. You should use GestoFIT 100 Injection as your doctor has advised. Do not use more or less than advised and do not use it for longer than recommended. You may be asked to continue taking this medicine for a period after you get pregnant.

The most common side effects include abdominal cramps, back pain, breast tenderness, hypotension and dizziness, hypercoagulant state, and vaginal bleeding. Your doctor may suggest ways to reduce or prevent these. Occasionally, it may cause a severe allergic reaction requiring urgent medical attention.

Inform your doctor if you have a history of breast cancer, unusual vaginal bleeding, or liver, kidney, or heart disease. Inform your doctor about all other medicines that you are taking as they may affect, or be affected by, this medicine. You will probably have several tests both before and during treatment with this medicine. GestoFIT 100 Injection can alter your thinking or reactions and you may feel very tired so be careful while driving or doing anything that requires you to be alert.

Uses of GestoFIT Injection

Benefits of GestoFIT Injection

Treatment of Female infertility
GestoFIT 100 Injection contains progesterone, a female hormone that is important in the regulation of ovulation and menstruation. It is used to cause menstrual periods in women who have not reached menopause but are not having periods due to a lack of natural progesterone in the body. This medicine helps to prepare the uterus for pregnancy by causing the uterus lining (endometrium) to thicken. This increases the chance of a successful pregnancy. You should use the medicine as prescribed for it to be effective. You may be asked to continue with this treatment for a period after becoming pregnant.

Hormone replacement therapy
Hormone placement therapy (HRT) is a treatment to relieve symptoms of menopause such as hot flushes, night sweats, mood swings, vaginal dryness, and reduced sex drive. Since menopause can last for several years, this treatment can make a big improvement to your daily life and mood. Progesterone is one of two important hormones (the other being is estrogen) used in this treatment. However, it may not treat all your symptoms, consult with your doctor. You should use this medicine as it is prescribed, and for as long as it is prescribed by your doctor.

Side effects of GestoFIT Injection

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 GestoFIT

Dizziness
Abdominal cramp
Back pain
Hypotension (low blood pressure)
Vaginal bleeding
Abdominal pain
Breast tenderness

How to use GestoFIT Injection

Your doctor or nurse will give you this medicine. Kindly do not self administer.

How GestoFIT Injection works

GestoFIT 100 Injection is a progesterone (female hormone). It helps to establish and maintain pregnancy. It also prevents the increase in thickness of the endometrium (lining of the uterus) caused by estrogen.

All substitutes for GestoFIT 100 Injection

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

Quick tips

GestoFIT 100 Injection is a natural progesterone available as a micronized formulation which helps in better absorption of this medicine.
It is used as a part of hormone replacement therapy generally in combination with an estrogen.
It may also be used in the treatment of problems related to menstrual periods such as amenorrhea (absence of periods).
It also helps in the maintenance of pregnancy in women who are at higher risk of miscarriage.
It may cause sleepiness or drowsiness. If this happens to you, do not drive or use machinery.

Safety advice

Alcohol

CONSULT YOUR DOCTOR

It is not known whether it is safe to consume alcohol with GestoFIT 100 Injection. Please consult your doctor.

Pregnancy

SAFE IF PRESCRIBED

GestoFIT 100 Injection is safe to use during pregnancy. Most studies have shown low or no risk to the developing baby.

Breast feeding

SAFE IF PRESCRIBED

Available human data suggest that the drug does not pass into breast milk in clinically significant amounts and is unlikely to harm the infant.

Driving

UNSAFE

GestoFIT 100 Injection may decrease alertness, affect your vision, or make you feel sleepy and dizzy. Do not drive if these symptoms occur.

Kidney

CONSULT YOUR DOCTOR

There is limited data available on the use of GestoFIT 100 Injection in patients with kidney disease. Please consult your doctor.

Liver

CONSULT YOUR DOCTOR

There is limited data available on the use of GestoFIT 100 Injection in patients with liver disease.

Interaction with drugs

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

Severe

Tamoxifen (Oral Route)

Do not consume Tamoxifen with Progesterone (Natural Micronized) if you have or had breast cancer. If essential, consult your doctor.

Severe

Letrozole (Oral Route)

Do not consume Letrozole with Progesterone (Natural Micronized) if you have or had breast cancer. If essential, consult your doctor.

Severe

Lorlatinib (Oral Route)

Do not consume Lorlatinib with Progesterone (Natural Micronized). Lorlatinib may reduce blood levels of Progesterone (Natural Micronized).

Severe

Darunavir (Oral Route)

It is recommended to use barrier methods (like condoms), IUDs, or a depot for contraception. Your doctor may monitor your treatment closely and adjust the doses as per the observations. Use barrier methods (like condoms) for contraception to reduce the risk of HIV infection.

Severe

Mycophenolate mofetil (Oral Route)

Effective contraception must be used before, during, and for at least 6 weeks after stopping Mycophenolate mofetil. It is recommended to consult your doctor. Mycophenolate mofetil may reduce the efficacy of Progesterone (Natural Micronized).

Frequently asked questions

What is GestoFIT 100 Injection and what is it used for?

GestoFIT 100 Injection contains progesterone, which is a natural female sex hormone. It is used to treat menstrual and pregnancy-related issues that are caused due to hormonal imbalance. It is also prescribed along with estrogen as a part of hormonal replacement therapy for preventing endometrial hyperplasia (thickening of the lining of the uterus).

How and in what dose should I take GestoFIT 100 Injection?

GestoFIT 100 Injection is given as an injection into the muscle, by a doctor or nurse only. The dose and duration are decided by your doctor, depending on your exact medical condition. Follow your doctor’s instructions carefully to get the maximum benefit from GestoFIT 100 Injection.

What are the common side effects which I can experience while taking GestoFIT 100 Injection?

The common side effects associated with GestoFIT 100 Injection are local injection site reactions (redness, pain, or swelling), nausea, vaginal discharge, weight changes, jaundice, mental depression, and fever. If any of these side effects bother you, please consult with your doctor.

Does GestoFIT 100 Injection cause weight gain?

Yes, the use of GestoFIT 100 Injection may cause weight gain. The weight gain may be due to water retention and may not be a serious sign. However, contact your doctor in case your weight gain is worrying you.

How is GestoFIT 100 Injection beneficial for fertility and pregnancy?

GestoFIT 100 Injection is a crucial hormone for fertility. It is the hormone secreted by the ovaries that helps prepare the uterus for pregnancy and maintain it. This is given as a medicine in cases of infertility to support the uterus in preparing itself for the pregnancy and to prevent abortions in some cases. It is also used to prevent premature labor.

Is GestoFIT 100 Injection effective?

GestoFIT 100 Injection is effective if used in the dose and duration advised by your doctor. Do not stop taking it even if you see improvement in your condition. If you stop using GestoFIT 100 Injection too early, the symptoms may return or worsen.

Fact Box

Chemical Class

Gluco/mineralocorticoids, progestogin derivative

Habit Forming

Therapeutic Class

GYNAECOLOGICAL

Action Class

Natural Progesterone

Related lab tests

Anti Mullerian Hormone

Glycosylated Hemoglobin

Testosterone Total

Thyroid Stimulating Hormone

References

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. 706-707.
Apgar S, Greenberg G. Using Progestins in Clinical Practice. Am Fam Physician. 2000;62(8):1839-46. [Accessed 03 Apr. 2019] (online) Available from:
Cable JK, Grider MH. Physiology, Progesterone. [Updated 2023 May 1]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023 [Accessed 25 Jul. 2023] (online) Available from:

User feedback

Patients taking GestoFIT 100 Injection

Once A Day

38%

Twice A Week

24%

Once A Week

19%

Alternate Day

11%

Once A Month

Twice A Month

What are you using GestoFIT Injection for?

Female infertility

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: Alembic Pharmaceuticals Ltd
Address: Alembic Road, Vadodara - 390 003, Gujarat,INDIA

Vendor Details

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

Lab tests offered by us

Why we need a prescription?

Provide right medicines

Prescriptions are complex documents. We proof read and recheck at various steps to provide you the right medication in the correct form and dose

In accordance with the law

Most medicines cannot be sold without a valid prescription, as per the Drugs and Cosmetics Act, 1940 and Rules, 1945

Size:

2 options

GestoFIT 100 Injection

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Save more with additional offers

General Information

Contains

Marketer

Storage

Product introduction

Uses of GestoFIT Injection

Benefits of GestoFIT Injection

Side effects of GestoFIT Injection

How to use GestoFIT Injection

How GestoFIT Injection works

All substitutes for GestoFIT 100 Injection

Microgest 100mg Injection

NATURogest 100mg Injection

Lupigest 100mg Injection

Neogest 100mg Injection

EMPRogest 100mg Injection

Quick tips

Safety advice

Alcohol

Pregnancy

Breast feeding

Driving

Kidney

Liver

Interaction with drugs

Tamoxifen (Oral Route)

Letrozole (Oral Route)

Lorlatinib (Oral Route)

Darunavir (Oral Route)

Mycophenolate mofetil (Oral Route)

Frequently asked questions

What is GestoFIT 100 Injection and what is it used for?

How and in what dose should I take GestoFIT 100 Injection?

What are the common side effects which I can experience while taking GestoFIT 100 Injection?

Does GestoFIT 100 Injection cause weight gain?

How is GestoFIT 100 Injection beneficial for fertility and pregnancy?

Is GestoFIT 100 Injection effective?

Fact Box

Chemical Class

Habit Forming

Therapeutic Class

Action Class

Related lab tests

Anti Mullerian Hormone

Glycosylated Hemoglobin

Testosterone Total

Thyroid Stimulating Hormone

References

User feedback

Patients taking GestoFIT 100 Injection

What are you using GestoFIT Injection for?

Want to know more

Have issue with the content

Disclaimer

Marketer details

Vendor Details

In case of any issues, contact us

Lab tests offered by us

Related/Popular tests