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.
Estring (Estradiol)
Prescription Required
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Product Details
Description
ESTRING (estradiol) is a medication prescribed to treat moderate to severe urogenital symptoms that are caused by postmenopause. ESTRING can treat symptoms of vaginal atrophy including:
- Burning
- Dryness
- Dyspareunia
- Pruritis
ESTRING can also treat symptoms that affect the lower urinary tract including:- Dysuria
- Urinary urgency
ESTRING contains the estrogen hormone estradiol, which releases approximately 7.5 micrograms every 24 hours. Estrogens are responsible for the maintenance of secondary sexual characteristics, and restoring estrogens levels can treat symptoms caused by the reduced estrogen that occurs during menopause.
Fact Table
Formula
C18H24O2
License
EU EMA
Bioavailability
5%
Legal status
Rx-Only
Chemical Name
Estradiol
Elimination half-life
13 - 36.5 hours
Dosage (Strength)
2mg
Pregnancy
Consult Doctor
Brands
Estring
Protein binding
98%
PubChem CID
5757
MedlinePlus
a605041
ChEBI
16469
ATC code
G03CA03
DrugBank
DB00783
KEGG
D00105
Routes of administration
By mouth (tablets)
Directions
Insert ESTRING into the upper third of the vaginal canal and wear it continuously for 90 days. ESTRING is designed to continuously release medication over this period of time.
ESTRING is an opaque ring with a whitish core.
Ingredients
The active ingredient in ESTRING is estradiol.
Cautions
ESTRING should not be used by women with a current clotting disorder or history of one. Examples include deep vein thrombosis (DVT), pulmonary embolism (PE), cardiovascular accident (stroke), or myocardial infarction (heart attack)
Do not use ESTRING if you are pregnant, suspect you are pregnant or are trying to get pregnant.
ESTRING should be used with caution in patients with impaired liver function.
ESTRING may increase the risk of certain cancers like endometrial cancer, breast cancer, and ovarian cancer. Speak with your doctor about your risk before starting ESTRING.
Side Effects
Some of the most common ESTRING side effects include:
- Abdominal pain
- Arthritis
- Back pain
- Vaginitis
- Headache
- Insomnia
- Nausea
- Skeletal pain
- Vaginal discomfort
- Vaginal hemorrhage
Speak with your doctor for a full list of side effects and warnings related to ESTRING.References
- Estring [package insert].New York, NY: Pfizer, 2018
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 : 1513
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