What is a Generic Drug?
A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.
The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.
Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.
Premarin (Conjugated Estrogens)
Prescription Required
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Product Details
Description
PREMARIN (Conjugated Estrogens) is a medication prescribed to treat a variety of conditions. The approved PREMARIN tablet uses include:
- Prevention of postmenopausal osteoporosis for women at significant risk of osteoporosis
- Palliative treatment of androgen-dependent carcinoma of the prostate in men
- Palliative treatment of metastatic breast cancer in certain women
- Treatment of low estrogen due to hypogonadism, castration, or ovarian failure
- Treatment of moderate to severe symptoms of vulvar and vaginal atrophy caused by menopause
- Treatment of moderate to severe vasomotor symptoms (night sweats, flushes, and hot flashes)
PREMARIN works by regulating levels of several hormones, including estrogen, luteinizing hormone, and follicle-stimulating hormone.
Fact Table
Formula
C18H19NaO5S
License
US FDA
Bioavailability
Variable
Legal status
Rx-Only
Chemical Name
Conjugated estrogens
Elimination half-life
26.7 hours
Dosage (Strength)
0.3mg, 0.45mg, 0.625mg, 0.9mg, 1.25mg
Pregnancy
Not Recommended
Brands
Premarin
Protein binding
High
PubChem CID
656613
MedlinePlus
a682922
ChEBI
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ATC code
G03CA57
DrugBank
DB00286
KEGG
D04070
Routes of administration
By mouth (Tablets)
Directions
The dosage of PREMARIN is dependent on what condition is being treated. Take PREMARIN exactly as prescribed by your dose. PREMARIN may be dosed every day or can be dosed in regular cycles.
Take PREMARIN by mouth with or without food.
Ingredients
The active ingredients in PREMARIN are a mixture of conjugated estrogens obtained from pregnant mares' urine. The tablet contains a mixture of sodium estrone sulfate and sodium equilin sulfate.
Cautions
Taking estrogen by itself without concurrent progesterone therapy may increase the risk of endometrial cancer.
Estrogen by itself without concurrent progesterone therapy may increase the risk of stroke and deep vein thrombosis (DVT) in women who have gone through menopause.
Estrogen therapy may increase the risk of dementia in postmenopausal women.
Estrogen plus progesterone hormone-replacement therapy may increase the risk of breast cancer.
Side Effects
The most common PREMARIN pill side effects may include:
- Abdominal Pain
- Breast Pain
- Flatulence
- Leg Cramps
- Leukorrhea
- Pruritis
- Vaginal Bleeding
- Vaginal Moniliasis
- Vaginitis
The above side effects were the most common experienced by patients participating in the original clinical trials. Speak with your doctor or pharmacist for a full list of side effects.
References
- Premarin [package insert]. Philadelphia, PA: Pfizer; 2011.
IMPORTANT NOTE: The above information is intended to increase awareness of health information and does not suggest treatment or diagnosis. This information is not a substitute for individual medical attention and should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. See your health care professional for medical advice and treatment.Product Code : 1733
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