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Weldec 25mg Injection

Written By Dr. Anuj Saini, MMST, MBBS
Reviewed By Dr. Sachin Gupta, MD Pharmacology, MBBS
Last updated on 25 Nov 2025 | 03:05 PM (IST)
Weldec 25mg Injection is a medicine used in the treatment of osteoporosis in post-menopausal women, a certain type of anemia, and breast cancer. It works by helping build and strengthen body tissues, including bones and muscles, and supports red blood cell production, which makes it beneficial in these conditions.
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Weldec 25mg Injection is currently sold out
Same composition alternative:
Decarin 25mg Injection
₹103₹117.19
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Weldec 25mg Injection
Weldec 25mg Injection
vial of 1 Injection
₹107
₹117.19
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Same composition
Decarin 25mg Injection
Decarin 25mg Injection
vial of 1 ml Injection
Nandrolone Decanoate (25mg)
by Leeford Healthcare Ltd
Get by 12am, Tomorrow
₹103
₹87.5 per unit

₹87.5

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₹1200

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General Information

Contains

Nandrolone Decanoate (25mg)

Marketer

Treatwell Biotech

Storage

Store below 30°C
The content is shown in English
Weldec 25mg Injection image
Weldec 25mg Injection image

Product introduction

Weldec 25mg Injection is generally given by a healthcare professional. You should not self-administer this medicine at home. Your doctor will decide the dose and how often you should take them. You should take it regularly to get the most benefit from it. Do not stop using the medicine even if you feel better unless the doctor tells you so.

Using this medicine may cause a few common side effects such as pain at the injection site, hypertension, acne, itching, nausea, abnormal liver function & increased or decreased sexual desire. Let your doctor know if any of these side effects bother you.

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

Uses of Weldec Injection

Benefits of Weldec Injection

Treatment of Post menopausal osteoporosis
Weldec 25mg Injection helps strengthen bones and reduce the risk of fractures in women with postmenopausal osteoporosis. It supports bone density and may improve overall bone health, especially in those who are at high risk of bone loss after menopause. With regular use as advised by a doctor, it can help maintain mobility, reduce bone pain, and improve quality of life.
Treatment of Breast cancer
Weldec 25mg Injection is used as part of supportive care in advanced breast cancer. It can help improve strength, maintain muscle mass, and support overall health, especially in patients experiencing weight loss or fatigue. Its use is determined by the doctor based on the individual’s condition and treatment goals.
Treatment of Anemia
Weldec 25mg Injection supports red blood cell production and helps improve hemoglobin levels over time, aiding in the management of certain types of anemia. As oxygen delivery in the body improves, patients often experience reduced fatigue, better stamina, and less breathlessness, which improves their ability to perform daily activities more comfortably. Overall, this helps improve patients’ energy levels and quality of life.

Side effects of Weldec 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 Weldec
  • Nausea
  • Acne
  • Injection site pain
  • Altered sexual function
  • High blood pressure
  • Itching
  • Abnormal liver function

How to use Weldec Injection

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

How Weldec Injection works

Weldec 25mg Injection is an anabolic steroid that works by promoting the growth and repair of body tissues. It improves protein synthesis and increases calcium retention in bones, which helps strengthen bone density in postmenopausal osteoporosis. It also stimulates the production of red blood cells in the bone marrow, making it effective in treating certain types of anemia. In breast cancer, Weldec 25mg Injection may help improve strength, support weight maintenance, and counteract muscle loss, particularly in advanced stages where patients experience fatigue and physical decline.

All substitutes for Weldec 25mg Injection

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

Metadec 25 Injection

by Jagsonpal Pharmaceuticals Ltd
₹267.2/injection
128% costlier
<h3 class=bodySemiBold>Metadec 25 Injection</h3>

Durabolin 25 Injection

by Zydus Healthcare Limited
₹168.75/injection
44% costlier
<h3 class=bodySemiBold>Durabolin 25 Injection</h3>

Biodebol 25mg Injection

by Biochem Pharmaceutical Industries
₹311.27/injection
166% costlier
<h3 class=bodySemiBold>Biodebol 25mg Injection</h3>

Anafos 25mg Injection

by Cubit Healthcare
₹64.22/injection
45% cheaper
<h3 class=bodySemiBold>Anafos 25mg Injection</h3>

Nadrev 25mg Injection

by Aarvi Drugs
₹93.75/injection
20% cheaper
<h3 class=bodySemiBold>Nadrev 25mg Injection</h3>

Quick tips

  • You have been prescribed Weldec 25mg Injection for the treatment of osteoporosis in women after menopause, anemia, and breast cancer.
  • It is given as an injection into muscle of upper arm or leg by your doctor.
  • Inform your doctor if you develop male characteristics such as hoarseness, increased hair growth, acne and increased sex drive.
  • Do not take Weldec 25mg Injection if you are pregnant, planning to conceive, or breastfeeding.

Safety advice

Alcohol

Alcohol

CONSULT YOUR DOCTOR
It is not known whether it is safe to consume alcohol with Weldec 25mg Injection. Please consult your doctor.
Pregnancy

Pregnancy

UNSAFE
Weldec 25mg Injection 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
Weldec 25mg Injection is unsafe to use during breastfeeding. Data suggests that the drug may cause toxicity to the baby.
Driving

Driving

SAFE
Weldec 25mg Injection does not usually affect your ability to drive.
Kidney

Kidney

CAUTION
Weldec 25mg Injection should be used with caution in patients with kidney disease. Dose adjustment may be needed.
Liver

Liver

CAUTION
Weldec 25mg Injection should be used with caution in patients with liver disease. Dose adjustment may be needed.

Interaction with drugs

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

Ciclosporin (Oral Route)

Do not consume Ciclosporin with Nandrolone Decanoate. If concurrent use is essential, your doctor may monitor your liver function frequently.
Severe

Ciclosporin (Injection Route)

Do not consume Ciclosporin with Nandrolone Decanoate. If concurrent use is essential, your doctor may monitor your liver function frequently.
Moderate

Gliclazide (Oral Route)

If concurrent use is essential, your doctor may monitor your glucose levels frequently and adjust the doses as per the observations.
Moderate

Glibenclamide (Oral Route)

If concurrent use is essential, your doctor may monitor your glucose levels frequently and adjust the doses as per the observations.
Moderate

Metformin (Oral Route)

If concurrent use is essential, your doctor may monitor your glucose levels frequently and adjust the doses as per the observations.

Frequently asked questions

Weldec 25mg Injection belongs to the group of medicines called anabolic steroids. It is used to treat osteoporosis in postmenopausal women, certain types of anemia, and breast cancer (in women). It can also be used to treat patients on long-term steroid therapy.
Individuals should not use Weldec 25mg Injection if they have prostate cancer, male breast cancer, breast cancer in women with high calcium levels, certain kidney diseases, or if they are pregnant.
Weldec 25mg Injection can cause serious liver problems such as blood-filled cysts or liver tumors, changes in cholesterol that increase heart disease risk, swelling due to fluid retention, and high calcium levels in women with certain cancers.
While using Weldec 25mg Injection, your doctor will monitor your liver, heart, and kidney health, blood calcium, cholesterol levels, and bone growth in children. Women should watch for signs of masculinization, such as a deep voice or facial hair.
No, Weldec 25mg Injection is not approved or safe for enhancing athletic performance. Misuse can cause serious health risks and is banned in competitive sports.

Fact Box

Chemical Class

Steroid esters

Habit Forming

No

Therapeutic Class

HORMONES

Action Class

Anabolic Steroids

Related lab tests

Breast Cancer (CA 15.3/ ER/ PR)

Calcium

Complete Blood Count

Iron Studies

Peripheral Smear Examination

Vitamin B12

References

  1. Central Drugs Standard Control Organisation (CDSCO). [Accessed 3 Apr. 2019] (online) Available from:
  2. Nandrolone decanoate injection [Product Information]. Corona, CA: Watson Laboratories, Inc.; 2007. [Accessed 25 Jul. 2024] (online) Available from:
  3. Gascón A, Belvis JJ, Berisa F, et al. Nandrolone decanoate is a good alternative for the treatment of anemia in elderly male patients on hemodialysis. Geriatr Nephrol Urol. 1999;9(2):67-72. [Accessed 25 Jul. 2024] (online) Available from:
  4. Nandrolone decanoate injection [Product Information]. Auckland, New Zealand: Merck Sharp & Dohme (New Zealand) Ltd; 2013. [Accessed 07 Jul. 2025] (online) Available from:
  5. Leeford: Nandrolone Decanoate [Product Information]. [Accessed 07 Jul. 2025] (online) Available from:
  6. Leeford: Nandrolone Decanoate [Product Information]. [Accessed 07 Jul. 2025] (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: Treatwell Biotech
Address: 1st floor , SCO. NO. 3-4, WADHAWA NAGAR, NEAR INDIAN BANK, DHAKOLI, M.C. ZIRAKPUR - 140603 S.A.S. NAGAR (MOHALI) (P.B) CHANDIGARH

Vendor Details

Country of origin: India

Lab tests offered by us

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