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
Triquilar 28
My Way
Indayo
Orsythia
Tyblume
Alesse 21
Kurvelo
Minivlar 30
Alysena 28
Chateal EQ
Backup Plan
Portia
Opcicon One-Step
Preventeza
Min-ovral 28 Tab
Aviane 28 Day
Ithappenz Morning After
Levlite
Climara Pro
Min-ovral 21
Julie
LoSeasonique
Rivelsa
After Banger
Lessina
Plan B
My Choice TM
Lutera
Afirmelle
Take Action
Aubra
Triphasil-21
Jaydess
Triphasil 21
Introvale
Triphasil 28 Tab
Ovima 28
Levonorgestrel Tablets, 0.75mg
Camrese
Laylaa 28
Amazon Basic Care Levonorgestrel
LEADER Emergency Contraceptive Levonorgestrel
Levora
Lutera 28
Nordette
Seasonale
Lillow
Triphasil 28
Falessa
New Day
Levonorgestrel and Ethinyl Estradoil
Levonorgestrel and Ethinyl Estradiol
Balcoltra
Preven Emergency Contraceptive
Portia 21
Aviane 21
Seasonique
Backup Plan Onestep
PostDay One-Step
Amethia Lo
Next Choice One Dose
Laylaa 21
Jaimiess
Empowered Choice
Econ Morning After
Aviane
Kyleena
Setlakin
Audrina 28
Norplant System Kit 36mg/implant
Joyeaux
Simpesse
Vienva Tm
Chateal
EContra EZ
Audrina 21
Minzoya
SheWise
Aftera
Marlissa
Twirla
Fallback Solo
Iclevia
AfterPill
Lutera 21
Enpresse
Levonorgetsrel and Ethinyl Estradiol
Min-ovral 21 Tab
Esme 21
Triphasil 21 Tab
Alysena 21
AfterPlan
Sronyx
Jolessa
Her style
Next Choice
Daysee
Fem Choice morning after
Option 2
Delyla
Levonorgestrel
Ayuna
camrese Lo
Contingency
Plan B One-Step
Alesse 28
Trivora
Levonorgestrel Emergency Contraceptive
Mystep
Quaterna
Levonorgestrel Tablet, 1.5 mg
Aubra EQ
Dolishale
Levonest
Skyla
Myzilra
Min-ovral 28
Amethia
Stix Restart
Amethyst
Fayosim
BionaFem
Contingency One
Athentia Next
LoJaimiess
Larissia
Falmina
Quartette
Altavera
Aviane 28
Portia 28
Ashlyna
EContra One-Step
Esme 28
Her Style
Ovima 21
Basic Care Levonorgestrel
Vienva TM
Morning After Pill
Mirena
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