Delestrogen 20mg/ml Inj,5ml

Manufacturer PAR Active Ingredient Estradiol Injection(es tra DYE ole) Pronunciation es tra DYE ole
WARNING: Do not use this drug to prevent heart disease or dementia. A study of women taking an estrogen with a progestin showed a raised chance of heart attack, stroke, blood clot, breast cancer, and dementia. The chance of stroke, blood clot, and dementia was also raised when the estrogen was taken alone. Not all products and doses were studied. It is not known if the same effects may happen with this drug.The chance of endometrial cancer may be raised with the use of estrogen alone in patients with a uterus. Use of a progestin along with estrogen may lower the risk. Call your doctor right away if you have unexplained or long-lasting vaginal bleeding.Use this drug for the shortest time needed at the lowest useful dose. Your doctor will talk with you on a regular basis to see if you need to keep taking this drug. @ COMMON USES: It is used to prevent or lower the signs of the change of life (menopause).It is used to add estrogen to the body when the ovaries have been taken out or do not work the right way.Rarely, it is used to treat breast or prostate cancers.It may be given to you for other reasons. Talk with the doctor.
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Drug Class
Hormone Replacement Therapy, Estrogen
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Pharmacologic Class
Estrogen Receptor Agonist
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Pregnancy Category
Category X
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FDA Approved
Mar 1954
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DEA Schedule
Not Controlled

Overview

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What is this medicine?

Delestrogen is an injectable form of estrogen, a female hormone. It is used to treat symptoms of menopause, such as hot flashes, and to replace estrogen in women whose bodies don't make enough, for example, due to certain medical conditions or surgery.
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How to Use This Medicine

Proper Use of This Medication

To ensure safe and effective use, follow your doctor's instructions carefully. Read all accompanying information and adhere to the provided guidelines. This medication is administered via injection into a muscle. If you are responsible for self-administering the injection, your doctor or nurse will provide personalized instruction on the proper technique.

Before use, inspect the solution for any signs of cloudiness, leakage, or particulate matter. The solution should be colorless to faintly yellow; do not use if the color has changed. Dispose of used needles and syringes in a designated sharps disposal container. Never reuse needles or other injectable items. When the disposal container is full, follow local regulations for proper disposal. If you have any questions or concerns, consult your doctor or pharmacist.

Storage and Disposal

If you need to store this medication at home, consult with your doctor, nurse, or pharmacist for guidance on proper storage procedures.

Missed Dose

If you miss a scheduled dose, contact your doctor for advice on the best course of action.
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Lifestyle & Tips

  • Do not smoke, as smoking significantly increases the risk of blood clots, heart attack, and stroke, especially when taking estrogen.
  • Maintain a healthy diet and regular exercise to support cardiovascular health.
  • Discuss any planned surgeries or prolonged bed rest with your doctor, as these situations can increase the risk of blood clots.
  • Report any unusual vaginal bleeding immediately to your doctor.
  • Perform regular breast self-exams and attend scheduled mammograms.
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Available Forms & Alternatives

Dosing & Administration

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Adult Dosing

Standard Dose: For moderate to severe vasomotor symptoms associated with menopause: 10 mg intramuscularly every 4 weeks. For hypoestrogenism due to hypogonadism, oophorectomy, or primary ovarian failure: 10 mg to 20 mg intramuscularly every 4 weeks.
Dose Range: 10 - 20 mg

Condition-Specific Dosing:

vasomotorSymptoms: 10 mg IM every 4 weeks
hypoestrogenism: 10 mg to 20 mg IM every 4 weeks
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Pediatric Dosing

Neonatal: Not established
Infant: Not established
Child: Not established for routine use; for primary ovarian failure/hypogonadism, dosing is individualized based on pubertal development, typically starting at lower doses (e.g., 0.1 to 0.2 mg/kg/month) and titrating.
Adolescent: For primary ovarian failure/hypogonadism: Initial doses are typically lower (e.g., 10 mg IM every 4 weeks) and titrated based on clinical response and pubertal development.
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Dose Adjustments

Renal Impairment:

Mild: No specific dose adjustment recommended.
Moderate: No specific dose adjustment recommended.
Severe: Use with caution; monitor for increased estrogen effects due to potential accumulation of metabolites.
Dialysis: Not available

Hepatic Impairment:

Mild: Use with caution; monitor for increased estrogen effects.
Moderate: Use with caution; monitor for increased estrogen effects. Consider lower starting doses.
Severe: Contraindicated in severe hepatic dysfunction or disease.
Confidence: Medium

Pharmacology

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Mechanism of Action

Estradiol is the primary estrogen secreted by the human ovary. It binds to and activates estrogen receptors (ERΞ± and ERΞ²) in target tissues, including the reproductive tract, breast, bone, and brain. This binding leads to gene transcription and protein synthesis, mediating the physiological effects of estrogens, such as the development and maintenance of the female reproductive system and secondary sex characteristics. In menopausal women, it replaces declining endogenous estrogen levels.
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Pharmacokinetics

Absorption:

Bioavailability: Estradiol valerate is a prodrug that is hydrolyzed to estradiol. After intramuscular injection, it is slowly absorbed, providing sustained release. Bioavailability of estradiol itself is high after IM injection, bypassing first-pass hepatic metabolism that occurs with oral administration.
Tmax: Approximately 2-3 days for estradiol after IM injection of estradiol valerate.
FoodEffect: Not applicable for intramuscular injection.

Distribution:

Vd: Approximately 1.2 L/kg for estradiol.
ProteinBinding: Approximately 98% bound to plasma proteins, primarily sex hormone-binding globulin (SHBG) and albumin.
CnssPenetration: Yes, crosses the blood-brain barrier.

Elimination:

HalfLife: Estradiol: Approximately 1-2 hours (after IV). For estradiol valerate IM, the effective half-life for sustained release is longer, leading to effects lasting weeks.
Clearance: High hepatic clearance.
ExcretionRoute: Primarily renal (urine) as glucuronide and sulfate conjugates; some biliary excretion.
Unchanged: <10%
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Pharmacodynamics

OnsetOfAction: Clinical effects may be observed within days to weeks, depending on the indication.
PeakEffect: Peak plasma levels of estradiol are reached within 2-3 days after IM injection.
DurationOfAction: Approximately 3-4 weeks due to slow release from the intramuscular depot.

Safety & Warnings

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BLACK BOX WARNING

Estrogens and progestins should not be used for the prevention of cardiovascular disease or dementia. The Women's Health Initiative (WHI) study reported increased risks of myocardial infarction, stroke, invasive breast cancer, pulmonary emboli, and deep vein thrombosis in postmenopausal women (50-79 years of age) receiving daily conjugated equine estrogens (CEE) alone or in combination with medroxyprogesterone acetate (MPA). The WHI Memory Study (WHIMS) reported an increased risk of probable dementia in postmenopausal women 65 years of age or older. Estrogen-alone therapy increases the risk of endometrial cancer in a woman with a uterus. Adequate diagnostic measures, including directed or random endometrial sampling when indicated, should be undertaken to rule out malignancy in all cases of undiagnosed persistent or recurrent abnormal genital bleeding.
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Side Effects

Urgent Side Effects: Seek Medical Help Right Away

Although rare, some people may experience severe and potentially life-threatening side effects while taking this medication. If you notice any of the following symptoms, contact your doctor or seek medical attention immediately:

Signs of an allergic reaction: rash, hives, itching, red, swollen, blistered, or peeling skin with or without fever, wheezing, tightness in the chest or throat, trouble breathing, swallowing, or talking, unusual hoarseness, or swelling of the mouth, face, lips, tongue, or throat
Signs of liver problems: dark urine, tiredness, decreased appetite, upset stomach or stomach pain, light-colored stools, vomiting, or yellow skin or eyes
Signs of gallbladder problems: pain in the upper right belly area, right shoulder area, or between the shoulder blades, yellow skin or eyes, fever with chills, bloating, or severe upset stomach or vomiting
Signs of pancreatitis (pancreas problem): severe stomach pain, severe back pain, or severe upset stomach or vomiting
Signs of high blood pressure: severe headache or dizziness, passing out, or changes in eyesight
Weakness on one side of the body, trouble speaking or thinking, changes in balance, drooping on one side of the face, or blurred eyesight
Eyesight changes or loss, bulging eyes, or changes in how contact lenses feel
Breast lump, breast pain or soreness, or nipple discharge
Vaginal itching or discharge
Abnormal vaginal bleeding
Depression or other mood changes
Memory problems or loss
Fever
Difficulty urinating or changes in urine output
Pain while urinating

This medication may cause fluid retention, leading to swelling or weight gain. If you experience swelling, weight gain, or trouble breathing, inform your doctor.

Blood Clots and High Calcium Levels

Seek medical attention immediately if you experience signs of a blood clot, such as:

Chest pain or pressure
Coughing up blood
Shortness of breath
Swelling, warmth, numbness, changes in color, or pain in a leg or arm
Trouble speaking or swallowing

High calcium levels have been reported in some people with cancer taking this medication. If you experience signs of high calcium levels, such as weakness, confusion, fatigue, headache, upset stomach or vomiting, constipation, or bone pain, contact your doctor right away.

Other Possible Side Effects

Most people do not experience significant side effects, but some may occur. If you are bothered by any of the following side effects or if they persist, contact your doctor:

Dizziness or headache
Hair loss
Upset stomach or vomiting
Constipation
Stomach pain or cramps
Bloating
Enlarged breasts
Tender breasts
Vaginal bleeding or spotting
Painful periods
Common cold symptoms
Nose or throat irritation
Weight gain or loss
Joint pain
Leg cramps
Changes in sex interest
* Irritation at the site of administration

This is not an exhaustive list of possible side effects. If you have questions or concerns about side effects, consult your doctor. You can also report side effects to the FDA at 1-800-332-1088 or online at https://www.fda.gov/medwatch.
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Seek Immediate Medical Attention If You Experience:

  • Sudden severe headache or migraines
  • Sudden vision changes (e.g., partial or complete loss of vision)
  • Sudden chest pain, shortness of breath, or coughing up blood
  • Pain, swelling, or tenderness in one or both legs
  • Yellowing of the skin or eyes (jaundice)
  • Lump in the breast
  • Unusual vaginal bleeding or spotting
  • Severe abdominal pain
  • Signs of an allergic reaction (e.g., rash, itching, swelling, severe dizziness, trouble breathing)
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Before Using This Medicine

Before Taking This Medication: Important Information to Share with Your Doctor

It is essential to inform your doctor about the following:

Any allergies you have, including allergies to this medication, its components, or other substances. Be sure to describe the allergic reaction and its symptoms.
A history of certain health conditions, such as:
+ Bleeding disorders
+ Blood clots or an increased risk of blood clots
+ Breast cancer
+ Liver problems or liver tumors
+ Heart attack
+ Stroke
+ Tumors that are sensitive to estrogen
Unexplained vaginal bleeding
Pregnancy or suspected pregnancy. Note: This medication should not be taken during pregnancy.

This list is not exhaustive, and it is crucial to discuss all your medications (prescription, over-the-counter, natural products, and vitamins) and health issues with your doctor and pharmacist. They will help determine if it is safe to take this medication with your other medications and health conditions. Never start, stop, or adjust the dosage of any medication without consulting your doctor first.
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Precautions & Cautions

It is essential to inform all your healthcare providers, including doctors, nurses, pharmacists, and dentists, that you are taking this medication. Your doctor may advise you to stop taking this drug before certain surgical procedures, and will provide guidance on when to resume taking it after the surgery or procedure.

If you anticipate being immobile for extended periods, such as during long trips, bedrest after surgery, or illness, discuss this with your doctor, as prolonged inactivity may increase your risk of developing blood clots. Additionally, if you have diabetes, it is crucial to closely monitor your blood sugar levels.

This medication may cause high blood pressure, so it is essential to have your blood pressure checked regularly, as directed by your doctor. You should also have your blood work and bone density checked as recommended by your doctor.

Regular breast exams and gynecology check-ups are vital, and you should also perform breast self-exams as instructed by your doctor. The risk of certain side effects, such as heart attack, stroke, breast cancer, and ovarian cancer, may vary depending on factors like the duration of estrogen use, whether it is taken with or without a progestin, and other individual factors. Discuss the benefits and risks of using this medication with your doctor.

High triglyceride levels have been associated with this medication, so inform your doctor if you have a history of elevated triglyceride levels. This drug may also cause dark skin patches on your face, so it is essential to avoid sun exposure, sunlamps, and tanning beds, and to use sunscreen and protective clothing and eyewear.

This medication may affect certain laboratory tests, so be sure to inform all your healthcare providers and lab personnel that you are taking this drug. Smoking can increase the risk of heart disease, so it is recommended that you do not smoke; discuss this with your doctor. Limit your alcohol consumption, and if you regularly drink grapefruit juice or eat grapefruit, consult with your doctor.

In some cases, this medication may affect growth in children and teenagers, so they may require regular growth checks; discuss this with your doctor. If you are 65 or older, use this medication with caution, as you may be more susceptible to side effects. If you are breastfeeding, consult with your doctor to discuss any potential risks to your baby.
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Overdose Information

Overdose Symptoms:

  • Nausea
  • Vomiting
  • Breast tenderness
  • Abdominal pain
  • Drowsiness/fatigue
  • Withdrawal bleeding in women

What to Do:

There is no specific antidote. Treatment is symptomatic and supportive. Discontinue the medication. Call 911 or Poison Control (1-800-222-1222).

Drug Interactions

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Contraindicated Interactions

  • Aromatase inhibitors (e.g., anastrozole, letrozole) - concurrent use may reduce efficacy of aromatase inhibitors.
  • Tranexamic acid - increased risk of thrombosis.
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Major Interactions

  • CYP3A4 inducers (e.g., carbamazepine, phenobarbital, phenytoin, rifampin, St. John's Wort) - may decrease estrogen levels and efficacy.
  • CYP3A4 inhibitors (e.g., clarithromycin, itraconazole, ketoconazole, ritonavir, grapefruit juice) - may increase estrogen levels and adverse effects.
  • Thyroid hormone replacement therapy (e.g., levothyroxine) - estrogens can increase thyroid-binding globulin, potentially increasing thyroid hormone requirements.
  • Anticoagulants (e.g., warfarin) - estrogens may decrease the anticoagulant effect of warfarin; monitor INR.
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Moderate Interactions

  • Corticosteroids - estrogens may increase the half-life of corticosteroids, leading to increased effects.
  • Cyclosporine - estrogens may inhibit cyclosporine metabolism, increasing its levels and toxicity.
  • Folic acid - estrogens may interfere with folate metabolism.
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Minor Interactions

  • Not available

Monitoring

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Baseline Monitoring

Complete medical history and physical examination (including blood pressure, breast and pelvic exam)

Rationale: To identify contraindications, risk factors for adverse events (e.g., cardiovascular disease, breast cancer), and establish baseline health status.

Timing: Prior to initiation of therapy.

Lipid profile (total cholesterol, HDL, LDL, triglycerides)

Rationale: Estrogens can affect lipid metabolism; baseline assessment is important.

Timing: Prior to initiation of therapy.

Liver function tests (ALT, AST, bilirubin)

Rationale: Estrogens are metabolized by the liver; baseline assessment is important, especially in patients with pre-existing liver conditions.

Timing: Prior to initiation of therapy.

Mammogram

Rationale: To screen for pre-existing breast conditions or cancer, as estrogen therapy can increase breast cancer risk.

Timing: Prior to initiation of therapy, as per screening guidelines.

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Routine Monitoring

Annual physical examination (including blood pressure, breast and pelvic exam)

Frequency: Annually

Target: Normal for age and health status

Action Threshold: Any significant changes, new symptoms, or abnormal findings require further investigation.

Mammogram

Frequency: Annually or as per screening guidelines

Target: No suspicious findings

Action Threshold: Any suspicious findings require further diagnostic workup.

Lipid profile

Frequency: Periodically, as clinically indicated

Target: Individualized based on cardiovascular risk

Action Threshold: Significant adverse changes or progression of dyslipidemia may require intervention or re-evaluation of therapy.

Liver function tests

Frequency: Periodically, as clinically indicated, especially if symptoms of hepatic dysfunction develop.

Target: Within normal limits

Action Threshold: Significant elevations or symptoms of liver dysfunction require immediate investigation and potential discontinuation.

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Symptom Monitoring

  • Signs of thromboembolic events (e.g., sudden chest pain, shortness of breath, leg pain/swelling, sudden severe headache, vision changes)
  • Signs of stroke (e.g., sudden numbness or weakness, confusion, trouble speaking, trouble walking)
  • Signs of myocardial infarction (e.g., chest pain, discomfort in other areas of upper body, shortness of breath)
  • Abnormal vaginal bleeding or spotting
  • Breast lumps or changes
  • Persistent nausea, vomiting, or abdominal pain (may indicate liver issues)
  • Jaundice (yellowing of skin or eyes)
  • Severe headaches or migraines
  • Mood changes, depression

Special Patient Groups

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Pregnancy

Contraindicated in pregnancy. There is no indication for estrogen therapy during pregnancy, and there is evidence of fetal harm (e.g., genital abnormalities in female fetuses exposed to diethylstilbestrol).

Trimester-Specific Risks:

First Trimester: Potential for adverse effects on fetal development, particularly genital abnormalities.
Second Trimester: Potential for adverse effects on fetal development.
Third Trimester: Potential for adverse effects on fetal development.
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Lactation

Not recommended during lactation. Estrogens are excreted in breast milk and can reduce the quantity and quality of breast milk. Potential adverse effects on the nursing infant are unknown but possible.

Infant Risk: L5 - Contraindicated/High risk. May decrease milk production and potentially affect the infant.
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Pediatric Use

Use in pediatric patients is generally limited to specific conditions such as primary ovarian failure or hypogonadism, where it is used to induce puberty and maintain secondary sexual characteristics. Dosing must be carefully individualized and monitored by a specialist. Safety and efficacy in children for other indications have not been established.

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Geriatric Use

Women 65 years of age or older have an increased risk of probable dementia when treated with estrogen-alone or estrogen plus progestin therapy. The risks of stroke and deep vein thrombosis are also increased in this population. Use the lowest effective dose for the shortest duration consistent with treatment goals and risks.

Clinical Information

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Clinical Pearls

  • Delestrogen (Estradiol Valerate Injection) provides a sustained release of estradiol, making it suitable for less frequent dosing (typically every 4 weeks) compared to oral or transdermal estrogens.
  • Always administer intramuscularly (IM) into a large muscle (e.g., gluteal muscle) to ensure proper absorption and minimize local reactions.
  • For women with an intact uterus, progestin therapy must be added to estrogen therapy to reduce the risk of endometrial hyperplasia and cancer.
  • Counsel patients extensively on the Black Box Warnings, particularly the increased risks of cardiovascular events, stroke, breast cancer, and dementia.
  • Regular follow-up appointments are crucial for monitoring efficacy, adverse effects, and adherence to screening guidelines (e.g., mammograms, pelvic exams).
  • Consider alternative routes of estrogen administration (e.g., transdermal patches, gels, vaginal rings) for patients who prefer to avoid injections or who may have specific risk factors where other routes might offer a different safety profile (e.g., lower VTE risk with transdermal).
  • This formulation is not typically used for contraception.
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Alternative Therapies

  • Other estrogen formulations (oral estradiol, conjugated estrogens, transdermal estradiol patches/gels/sprays, vaginal estradiol creams/tablets/rings)
  • Selective Estrogen Receptor Modulators (SERMs) for specific indications (e.g., ospemifene for dyspareunia, bazedoxifene/conjugated estrogens for vasomotor symptoms with intact uterus)
  • Non-hormonal therapies for vasomotor symptoms (e.g., SSRIs/SNRIs, gabapentin, clonidine)
  • Testosterone therapy (off-label for some symptoms of hypoestrogenism)
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Cost & Coverage

Average Cost: Varies widely, typically $50 - $200 per 5ml vial (20mg/ml)
Generic Available: Yes
Insurance Coverage: Tier 2 or 3 (Brand), Tier 1 (Generic)
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General Drug Facts

If your symptoms or health problems persist or worsen, it is essential to contact your doctor for further guidance. To ensure safe use, never share your medication with others, and do not take medication prescribed for someone else. Store all medications in a secure location, out of reach of children and pets, to prevent accidental ingestion.

Proper disposal of unused or expired medications is crucial. Do not dispose of them by flushing down the toilet or pouring down the drain unless specifically instructed to do so. If you are unsure about the correct disposal method, consult your pharmacist for advice. Many communities have drug take-back programs, which your pharmacist can help you locate.

Some medications may come with an additional patient information leaflet; check with your pharmacist to see if this applies to your prescription. If you have any questions or concerns about your medication, do not hesitate to discuss them with your doctor, nurse, pharmacist, or other healthcare provider.

In the event of a suspected overdose, immediately contact your local poison control center or seek emergency medical attention. Be prepared to provide detailed information about the overdose, including the name of the medication, the amount taken, and the time it occurred, to ensure prompt and effective treatment.