Levonorgestrel (LNG) is a synthetic progestogen similar to [Progesterone] used in contraception and hormone therapy.[A181988,T659] Also known as Plan B, it is used as a single agent in emergency contraception, and as a hormonal contraceptive released from an intrauterine device, commonly referred to as an IUD. Some of these devices are known as Jaydess, Kyleena, and Mirena. A subdermal implant of levonorgestrel that slowly releases the hormone over a long-term period is also available.[L7823] In addition to the above uses, levonorgestrel is used as a component of long-term combination contraceptives.[A181991,L7760,L7778] Globally, levonorgestrel is the most commonly used emergency contraceptive. It was initially granted FDA approval in 1982 and was the first emergency contraceptive containing only progesterone, showing high levels of efficacy and a lack of estrogenic adverse effects when compared to older emergency contraceptive regimens.[A181976,A181994,L7760]
Levonorgestrel and Ethinyl Estradiol and Ethinyl Estradiol
Lo Simpesse
Levonorgestrel and Ethinyl Estradiol
Levonorgestrel Tablets, 0.75mg
Myzilra
Triphasil 28 Tab
Nordette
Stix Restart
LEADER Emergency Contraceptive Levonorgestrel
Min-ovral 21
PostDay One-Step
Ashlyna
Vienva TM
camrese Lo
Delyla
Alysena 28
Lutera 21
Preven Tablets
Amethia
Her style
Morning After
Minivlar 30
Empowered Choice
Falessa
Falmina
My Way
Laylaa 28
Larissia
Setlakin
Min-ovral 21 Tab
Fallback Solo
Vienva
Basic Care Levonorgestrel
EContra EZ
Morning After Pill
Iclevia
Tyblume
Triphasil 28
Triquilar 28
Backup Plan
Esme 21
Rivelsa
Next Choice
Aviane 21
Dolishale
Kyleena
Optionelle
Ovima 21
Skyla
Contingency
Plan B One-Step
Fem Choice morning after
Marlissa
Triphasil 21
Alesse 21
Backup Plan Onestep
Esme 28
Indayo
Lutera
Portia
Enpresse
Jaimiess
Levonorgestrel Emergency Contraceptive
Levora
Her Style
Ayuna
BionaFem
Chateal
Audrina 21
Introvale
Norlevo
Option 2
Audrina 28
Triphasil 21 Tab
Min-ovral 28
LoJaimiess
Opcicon One-Step
Plan B
Trivora
Twirla
Joyeaux
Teva-levonorgestrel
Mirena
Preven Emergency Contraceptive
Seasonique
SheWise
LoSeasonique
Portia 28
Curae
Quasense
Levonest
Min-ovral 28 Tab
Quaterna
Daysee
Seasonale
AfterPlan
Climara Pro
Julie
Fayosim
Aubra
Levonorgestrel Tablet, 1.5 mg
Camrese
Emergency Contraceptive
Portia 21
Take Action
Ithappenz Morning After
Amethia Lo
Aviane 28 Day
Kurvelo
Alysena 21
My Choice TM
Contingency One
Balcoltra
Altavera
Amethyst
Alesse 28
Econ Morning After
Ovima 28
Levonorgestrel
Aubra EQ
Triquilar 21
Jolessa
AfterPill
After Banger
Simpesse
Chateal EQ
Lutera 28
Quartette
Aftera
Lybrel
Levonorgetsrel and Ethinyl Estradiol
Norplant System Kit 36mg/implant
Levonorgestrel and Ethinyl Estradoil
Lessina
Lillow
Orsythia
Aviane
Next Choice One Dose
Aviane 28
Indication
**Emergency contraception** Levonorgestrel, in the single-agent emergency contraceptive form, is indicated for the prevention of pregnancy after the confirmed or suspected failure of contraception methods or following unprotected intercourse. It is distributed by prescription for patients under 17, and over the counter for those above this age.[L7760] This levonorgestrel-only form of contraception is not indicated for regular contraception and must be taken as soon as possible within 72 hours after intercourse.[A181976,L7760] It has shown a lower efficacy when it is used off label within 96 hours.[T659] **Long-term contraception or nonemergency contraception** In addition to the above indication in emergency contraception, levonorgestrel is combined with other contraceptives in contraceptive formulations designed for regular use, for example with ethinyl estradiol.[L7766] It is used in various hormone-releasing intrauterine devices for long-term contraception ranging for a duration of 3-5 years.[L7778,L7781,L7787] Product labeling for Mirena specifically mentions that it is recommended in women who have had at least 1 child and can be indicated for the prevention of pregnancy for up to 8 years.[L7778,L42950] A subdermal implant is also available for the prevention of pregnancy for up to 5 years.[L7823] **Hormone therapy and off-label uses** Levonorgestrel is prescribed in combination with estradiol as hormone therapy during menopause to manage vasomotor symptoms and to prevent osteoporosis.[L7805]Off-label, levonorgestrel may be used to treat menorrhagia, endometrial hyperplasia, and endometriosis.[T659]
Categories
Adrenal Cortex Hormones
Combination Contraceptives (with Estrogen and derivatives)
Contraceptive Agents, Female
Contraceptive Agents, Hormonal
Contraceptives, Oral
Contraceptives, Oral, Synthetic
Contraceptives, Postcoital
Cytochrome P-450 CYP3A Substrates
Cytochrome P-450 CYP3A4 Substrates
Cytochrome P-450 CYP3A5 Substrates
Cytochrome P-450 Substrates
Fused-Ring Compounds
Genito Urinary System and Sex Hormones
Hormonal Contraceptives for Systemic Use
Hyperglycemia-Associated Agents
Inhibit Ovum Fertilization
Norpregnanes
Norpregnenes
Norsteroids
Progestin Contraceptives
Progestin-containing Intrauterine Device
Progestins
Progestogens and Estrogens, Sequential Preparations
Drug Info/Drug Targets: DrugBank 3.0: a comprehensive resource for 'omics' research on drugs. Knox C, Law V, Jewison
T, Liu P, Ly S, Frolkis A, Pon A, Banco K, Mak C, Neveu V, Djoumbou Y, Eisner R, Guo AC, Wishart DS.
Nucleic Acids Res. 2011 Jan; 39 (Database issue):D1035-41. | PMID:21059682