Drug Information for Aviane - 28 DAY (levonorgestrel and ethinyl estradiol tablets, USP) (Barr Laboratories Inc.): INDICATIONS AND USAGE

  • Aviane is indicated for the prevention of pregnancy in women who elect to use oral contraceptives as a method of contraception.

    Oral contraceptives are highly effective. Table II lists the typical accidental pregnancy rates for users of combination oral contraceptives and other methods of contraception. The efficacy of these contraceptive methods, except sterilization, the IUD, and Norplant® System, depends upon the reliability with which they are used. Correct and consistent use of methods can result in lower failure rates.

    Table II: Percentage of Women Experiencing an Unintended Pregnancy During the First Year of Typical Use and the First Year of Perfect Use of Contraception and the Percentage Continuing Use at the End of the First Year. United States.
    Source: Trussell J. Contraceptive efficacy. In: Hatcher RA, Trussell J, Stewart F, Cates W, Stewart GK, Kowel D, Guest F. Contraceptive Technology: Seventeenth Revised Edition. New York NY: Irvington Publishers; 1998.

    % of Women Experiencing an

    Unintended Pregnancy within the

    First Year of Use

    % of Women Continuing

    Use at One Year Among couples attempting to avoid pregnancy, the percentage who continue to use a method for one year.



    Typical Use Among typical couples who initiate use of a method (not necessarily for the first time), the percentage who experience an accidental pregnancy during the first year if they do not stop use for any other reason.


    Perfect Use Among couples who initiate use of a method (not necessarily for the first time) and who use it perfectly (both consistently and correctly), the percentage who experience an accidental pregnancy during the first year if they do not stop use for any other reason.

    Chance The percents becoming pregnant in columns (2) and (3) are based on data from populations where contraception is not used and from women who cease using contraception in order to become pregnant. Among such populations, about 89% become pregnant within one year. This estimate was lowered slightly (to 85%) to represent the percent who would become pregnant within one year among women now relying on reversible methods of contraception if they abandoned contraception altogether. 8585
    Spermicides Foams, creams, gels, vaginal suppositories, and vaginal film. 26640
    Periodic abstinence2563
    Ovulation Method3
    Sympto-Thermal Cervical mucus (ovulation) method supplemented by calendar in the pre-ovulatory and basal body temperature in the post-ovulatory phases. 2
    Cap With spermicidal cream or jelly.
    Parous Women402642
    Nulliparous Women20956
    Parous Women402042
    Nulliparous Women20956
    Diaphragm  20656
    Condom Without spermicides.
    Female (Reality)21556
    Progestin only 0.5
    Progesterone T21.581
    Copper T380A0.80.678
    LNg 200.10.181


    Implants (Norplant®)
    Female Sterilization0.50.5100
    Male Sterilization0.150.10100
    Emergency Contraceptive Pills: The FDA has concluded that certain combined oral contraceptives containing ethinyl estradiol and norgestrel or levonorgestrel are safe and effective for use as postcoital emergency contraception. Treatment initiated within 72 hours after unprotected intercourse reduces the risk of pregnancy by at least 75%.The treatment schedule is one dose within 72 hours after unprotected intercourse, and a second dose 12 hours after the first dose. The FDA has declared the following dosage regimens of oral contraceptives to be safe and effective for emergency contraception: for tablets containing 50 mcg of ethinyl estradiol and 500 mcg of norgestrel 1 dose is 2 tablets; for tablets containing 20 mcg of ethinyl estradiol and 100 mcg of levonorgestrel 1 dose is 5 tablets; for tablets containing 30 mcg of ethinyl estradiol and 150 mcg of levonorgestrel 1 dose is 4 tablets.
    Lactation Amenorrhea Method: LAM is a highly effective, temporary method of contraception.However, to maintain effective protection against pregnancy, another method of contraception must be used as soon as menstruation resumes, the frequency or duration of breast-feeds is reduced, bottle feeds are introduced, or the baby reaches 6 months of age.

    In a clinical trial with levonorgestrel and ethinyl estradiol 0.10 mg/0.02 mg tablets, 1,477 subjects had 7,720 cycles of use and a total of 5 pregnancies were reported. This represents an overall pregnancy rate of 0.84 per 100 woman-years. This rate includes patients who did not take the drug correctly. One or more pills were missed during 1,479 (18.8%) of the 7,870 cycles; thus all tablets were taken during 6,391 (81.2%) of the 7,870 cycles. Of the total 7,870 cycles, a total of 150 cycles were excluded from the calculation of the Pearl index due to the use of back-up contraception and/or missing 3 or more consecutive pills.

  • Drug Information Provided by National Library of Medicine (NLM).