July 3, 2015
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Enjuvia Side Effects Center

Medical Editor: John P. Cunha, DO, FACOEP

Enjuvia (synthetic conjugated estrogens, B) is a form of estrogen, a female sex hormone, used to treat symptoms of menopause such as hot flashes, and vaginal dryness, burning, and irritation. Other uses include prevention of osteoporosis in postmenopausal women, and replacement of estrogen in women with ovarian failure or other conditions that cause a lack of natural estrogen in the body. Conjugated estrogens are sometimes used as part of cancer treatment in women and men. Common side effects include stomach upset, nausea/vomiting, bloating, breast tenderness, headache, or weight changes.

Patients should be started at the lowest approved dose of 0.3 mg Enjuvia daily. Enjuvia may interact with blood thinner, thyroid medications, insulin or oral diabetes medicines, rifampin, ketoconazole or itraconazole, seizure medicines, barbiturates, or antidepressants. Tell your doctor all medications and supplements you use. Enjuvia must not be used during pregnancy. If you become pregnant or think you may be pregnant, tell your doctor immediately. Enjuvia passes into breast milk. It may reduce the quality and amount of breast milk produced. Consult your doctor before breastfeeding.

Our Enjuvia (synthetic conjugated estrogens, B) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What is Patient Information in Detail?

Easy-to-read and understand detailed drug information and pill images for the patient or caregiver from Cerner Multum.

Enjuvia in Detail - Patient Information: Side Effects

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Stop using conjugated estrogens and call your doctor at once if you have a serious side effect such as:

  • chest pain or heavy feeling, pain spreading to the arm or shoulder, nausea, sweating, general ill feeling;
  • sudden numbness or weakness, especially on one side of the body;
  • sudden severe headache, confusion, problems with vision, speech, or balance;
  • pain, swelling, warmth, or redness in one or both legs;
  • abnormal vaginal bleeding;
  • migraine headache;
  • pain, swelling, or tenderness in your stomach;
  • confusion, problems with memory or concentration;
  • jaundice (yellowing of the skin or eyes);
  • swelling in your hands, ankles, or feet; or
  • a breast lump.

Less serious side effects may include:

  • mild nausea, vomiting, bloating, stomach cramps;
  • breast pain, tenderness, or swelling;
  • freckles or darkening of facial skin;
  • increased hair growth, loss of scalp hair;
  • changes in weight or appetite;
  • problems with contact lenses;
  • vaginal itching or discharge;
  • changes in your menstrual periods, decreased sex drive; or
  • mild headache, nervousness, dizziness, tired feeling.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the entire detailed patient monograph for Enjuvia (Synthetic Conjugated Estrogens, B)

What is Patient Information Overview?

A concise overview of the drug for the patient or caregiver from First DataBank.

Enjuvia Overview - Patient Information: Side Effects

SIDE EFFECTS: See also Warning section.

Stomach upset, nausea/vomiting, bloating, breast tenderness, headache, or weight changes may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.

Tell your doctor promptly if you see the tablet in your stool.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor right away if you have any serious side effects, including: mental/mood changes (such as depression, memory loss), breast lumps, unusual vaginal bleeding (such as spotting, breakthrough bleeding, prolonged/recurrent bleeding), increased or new vaginal irritation/itching/odor/discharge, severe stomach/abdominal pain, persistent nausea/vomiting, yellowing eyes/skin, dark urine, swelling hands/ankles/feet, increased thirst/urination.

This medication may rarely cause serious problems from blood clots (such as heart attacks, strokes, deep vein thrombosis, pulmonary embolism). Get medical help right away if you have any serious side effects, including: chest/jaw/left arm pain, unusual sweating, sudden/severe headache, weakness on one side of the body, confusion, slurred speech, sudden vision changes (such as partial/complete blindness), pain/redness/swelling of legs, tingling/weakness/numbness in the arms/legs, trouble breathing, coughing up blood, sudden dizziness/fainting.

A very serious allergic reaction to this product is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Read the entire patient information overview for Enjuvia (Synthetic Conjugated Estrogens, B)

What is Prescribing information?

The FDA package insert formatted in easy-to-find categories for health professionals and clinicians.

Enjuvia FDA Prescribing Information: Side Effects
(Adverse Reactions)



Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The adverse reaction information from clinical trials does, however, provide a basis for identifying the adverse events that appear to be related to drug use and for approximating rates.

In a 12-week clinical trial, 209 postmenopausal women with vasomotor symptoms were treated with ENJUVIA (synthetic conjugated estrogens, b) . Adverse events that occurred in the study at a rate greater than or equal to 5% and greater than placebo, regardless of relationship to study drug, are summarized in Table 8.

Table 8. ENJUVIA (synthetic conjugated estrogens, b) Tablets - Number (%) of Patients Reporting Aderse Events* with ≥ 5% Occurrence Rate by Body System

Body System/Adverse Event* 0.3 mg
0.625 mg
1.25 mg
Number of Patients in Safety Sample (%) 68 (100) 72 (100) 69 (100) 72 (100)
Number of Patients with Adverse Events (%) 49 (72) 55 (76) 56 (81) 51 (71)
Number of Patients without Adverse Events (%) 19 (28) 17 (24) 13 (19) 21 (29)
Body as a Whole        
  Abdominal Pain 3 (4) 11 (15) 3 (4) 7 (10)
  Accidental Injury 6 (8) 2 (3) 3 (4) 5 (7)
  Flu Syndrome 4 (6) 3 (4) 5 (7) 3 (4)
  Headache 10 (15) 18 (25) 11 (16) 15 (21)
  Pain 10 (15) 14 (19) 7 (10) 6 (8)
Digestive System        
  Flatulence 3 (4) 5 (7) 3 (4) 2 (3)
  Nausea 5 (7) 7 (10) 8 (12) 6 (8)
Nervous System        
  Dizziness 5 (7) 3 (4) 1 (1) 3 (4)
  Paresthesia 0 4 (6) 1 (1) 0
Respiratory System        
  Bronchitis 0 3 (4) 5(7) 3 (4)
  Rhinitis 3 (4) 4 (6) 5 (7) 4 (6)
  Sinusitis 2 (3) 3 (4) 5 (7) 2 (3)
Urogenital System        
  Breast Pain 0 9 (12) 10 (14) 3 (4)
  Dysmenorrhea 1 (2) 6 (8) 1 (1) 2 (3)
  Vaginitis 1 (2) 5 (7) 2 (3) 3 (4)
*Treatment-emergent adverse events, regardless of relationship to study drug

In a second 12-week clinical trial, 310 women with symptoms of vulvar and vaginal atrophy were treated (154 women with ENJUVIA (synthetic conjugated estrogens, b) 0.3 mg tablets and 156 women with placebo). The only adverse event that occurred at a rate of > 5% was headache; seven patients (4.55%) with ENJUVIA (synthetic conjugated estrogens, b) and twelve patients (7.69%) with placebo.

The following additional adverse reactions have been reported with estrogen and/or progestin therapy:

1. Genitourinary system

Changes in vaginal bleeding pattern and abnormal withdrawal bleeding or flow; breakthrough bleeding; spotting; dysmenorrhea; increase in size of uterine leiomyomata; vaginitis, including vaginal candidiasis; change in amount of cervical secretion; changes in cervical ectropion; ovarian cancer; endometrial hyperplasia; endometrial cancer.

2. Breasts

Tenderness, enlargement, pain, nipple discharge, galactorrhea; fibrocystic breast changes; breast cancer.


Deep and superficial venous thrombosis; pulmonary embolism; thrombophlebitis; myocardial infarction; stroke; increase in blood pressure.

4. Gastrointestinal

Nausea, vomiting; abdominal cramps, bloating; cholestatic jaundice; increased incidence of gallbladder disease; pancreatitis, enlargement of hepatic hemangiomas.

5. Skin

Chloasma or melasma that may persist when drug is discontinued; erythema multiforme; erythema nodosum; hemorrhagic eruption; loss of scalp hair; hirsutism; pruritus, rash.

6. Eyes

Retinal vascular thrombosis, intolerance to contact lenses.

7. Central Nervous System

Headache; migraine; dizziness; mental depression; chorea; nervousness; mood disturbances; irritability; exacerbation of epilepsy, dementia.

8. Miscellaneous

Increase or decrease in weight; reduced carbohydrate tolerance; aggravation of porphyria; edema; arthralgias; leg cramps; changes in libido; urticaria, angioedema, anaphylactoid/anaphylactic reactions; hypocalcemia; exacerbation of asthma; increased triglycerides.

Read the entire FDA prescribing information for Enjuvia (Synthetic Conjugated Estrogens, B)

Enjuvia - User Reviews

Enjuvia User Reviews

Now you can gain knowledge and insight about a drug treatment with Patient Discussions.

Here is a collection of user reviews for the medication Enjuvia sorted by most helpful. Patient Discussions FAQs

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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