Levora Side Effects
Generic Name: ethinyl estradiol / levonorgestrel
Note: This page contains information about the side effects of ethinyl estradiol / levonorgestrel. Some of the dosage forms included on this document may not apply to the brand name Levora.
Not all side effects for Levora may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.
For the Consumer
Applies to ethinyl estradiol / levonorgestrel: tablets
Check with your doctor if any of these most COMMON side effects persist or become bothersome:
Seek medical attention right away if any of these SEVERE side effects occur while taking ethinyl estradiol / levonorgestrel:
Breast tenderness; changes in appetite; dizziness; headache; mild hair loss; nausea; nervousness; vaginal spotting or breakthrough bleeding; vomiting; weight gain.
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue; unusual hoarseness); breast discharge; breast lumps; calf or leg pain, swelling, or tenderness; change in amount of urine produced; chest pain or heaviness; confusion; coughing of blood; dark urine; fainting; mental or mood changes (eg, depression); migraines; numbness of an arm or leg; one-sided weakness; pale stools; persistent, severe, or recurring headache or dizziness; persistent vaginal spotting; severe pain or tenderness in the stomach; shortness of breath; slurred speech; sudden severe headache or vomiting; swelling of the fingers, hands, legs, or ankles; unusual or severe vaginal bleeding; unusual tiredness or weakness; vaginal irritation, discharge, or odor; vision changes (eg, sudden vision loss, double vision); yellowing of the skin or eyes.
For Healthcare Professionals
Applies to ethinyl estradiol / levonorgestrel: oral tablet
Cardiovascular side effects of hypertension and edema have been attributed to the estrogen component of this combination product. Significant blood pressure increases generally occurred only in women receiving high-dose estrogen products (50 mcg or more of ethinyl estradiol or equivalent daily). Exogenous estrogens may exert cardioprotective effects due to favorable changes in lipid profiles, however, beneficial effects may be partially or completely offset by alterations in lipid profiles induced by exogenous progestins.[Ref]
Detailed information concerning the effects of oral contraceptive therapy on lipid metabolism is available in the Endocrine paragraph of this side effect monograph.
Early investigations of high dose estrogen combinations (50 mcg or more of ethinyl estradiol or equivalent daily) suggested that women may be at increased risk of cardiovascular complications (myocardial infarction, stroke, and vascular thrombosis, including venous thromboembolism). More recent investigations of low dose estrogen combinations have suggested that oral contraceptive use is not associated with an increased risk of serious cardiovascular complications in healthy non smoking women up to the age of 45. Oral contraceptive use for women aged 35 to 44 who smoke or who have preexisting systemic diseases that may affect the cardiovascular system is not recommended.
Some investigators have suggested that even low dose products may result in adverse lipid metabolism and a woman's cardiovascular risk factors should be assessed before a decision is made to use oral contraceptive combinations.
The frequency of both subarachnoid hemorrhage and thrombotic stroke has been increased in women taking oral contraceptive hormones, however, the risk of these effects with low dose formulations appear to be very small for young women without underlying cardiovascular disease or other risk factors.[Ref]
Women taking oral contraceptive combinations have experienced several noncontraceptive health benefits. These benefits have included protection against two malignant neoplasms (endometrial carcinoma and ovarian cancer). In addition, use of oral contraceptive combinations has decreased the frequency of benign breast tumors, the risk of ovarian cysts, the risk of ectopic pregnancy, menstrual irregularity, the incidences of iron deficiency anemia, dysmenorrhea, and pelvic inflammatory disease.
Many of the adverse effects experienced by women on oral contraceptive combination products are related to a relative excess or deficiency of the estrogen and progestin components of these formulations. The following categorizes many of the frequent adverse effects by relative excess or deficiency of these components.
Acne, oily skin
Late breakthrough bleeding
Early/midcycle breakthrough bleeding
A number of studies have suggested that use of oral contraceptives decreased the risk of ovarian cancer. Specifically, the risk of epithelial ovarian cancers is decreased by 40%. The protection against ovarian cancer may last for 10 to 15 years after discontinuation of oral contraceptives. After long term use (12 years), the risk of ovarian cancer is decreased by as much as 80%.
The risk of endometrial cancer is decreased by approximately 50%. Protection may last for 15 years after discontinuation and may be greatest for nulliparous women who may be at higher risk for endometrial carcinoma than other women.
The incidence of hospitalization for pelvic inflammatory disease has been approximately 50% lower in women taking oral contraceptives. The reason for the decrease in the frequency (or severity) of pelvic inflammatory disease in women taking oral contraceptives has not been fully elucidated.
Some recent studies have suggested that the decrease in frequency of functional ovarian cysts reported with some older formulations may not occur in women taking newer low dose formulations.
One recent study (The Nurses' Health Study) has suggested that long term use of oral contraceptives is safe and does not adversely affect long term risk for mortality.[Ref]
Nausea, a relatively common gastrointestinal side effect, has occurred in approximately 10% of treated women during the first cycles of therapy. Some early reports suggested an association between oral contraceptive use and gallbladder disease.[Ref]
Cases of oral contraceptive induced esophageal ulceration and geographic tongue have been reported rarely.
More recent studies have suggested that the risk of gallbladder disease is minimal.[Ref]
Oral contraceptive combinations have been studied extensively for oncologic side effects. A number of studies have examined a possible relationship between the use of oral contraceptives and the development of breast cancer. Many of the studies have reported conflicting results. A committee of the World Health Organization evaluated these studies and the risks of breast cancer and concluded that: "Numerous studies have found no overall association between oral contraceptive use and risk of breast cancer." In addition, the same committee also examined a possible relationship between oral contraceptive use and neoplasms of the uterine cervix and concluded that: "There are insufficient data to draw any firm conclusions regarding the effects of combined oral contraceptives on the risk of cervical adenocarcinoma."[Ref]
The World Health Organization committee also noted that some studies "have found a weak association between long-term use of oral contraceptives and breast cancer diagnosed before the age of 36, and perhaps up to the age 45....It is unclear whether this observed association is attributable to bias, the development of new cases of cancer, or accelerated growth of existing cancers."
The World Health Organization committee further concluded that there is no increased risk of breast cancer in women over the age of 45 who have previously taken oral contraceptives. In addition, studies suggest that use of oral contraceptives does not place specific groups of women (like those with a family history of breast cancer) at higher or lower risk, and variations in the hormonal content of oral contraceptives do not influence the risk of breast cancer.
In general, studies evaluating the potential risk of cervical cancer in patients taking oral contraceptives have been complicated by the large number of confounding factors which make investigations into the epidemiology of this neoplasm difficult. Some studies have suggested that women taking oral contraceptives are at increased risk of dysplasia, epidermoid carcinoma, and adenocarcinoma of the cervix. However, other studies have not found such an association.[Ref]
Endocrine effects have included complex alterations in plasma lipid profiles.[Ref]
All progestins which occur in commercially available oral contraceptive combinations have adverse effects on lipid profiles. These progestins exert antiestrogen and androgen effects and decrease HDL (and HDL2) cholesterol levels and increase LDL cholesterol levels. The estrogen component of oral contraceptive combinations exert opposing effects. Consequently, alterations in lipid profiles are related to the relative amount and potency of the specific estrogen and progestin in a given product. (Levonorgestrel exerts potent progestin, antiestrogen, and androgen effects.)[Ref]
The rate of death due to hepatocellular carcinoma in the United States has not changed during the last 25 years (a time during which use of oral contraceptive hormones has increased dramatically).
A committee of the World Health Organization has reported that in developing countries where hepatitis B virus infection and hepatocellular carcinoma are common, "short term use of oral contraceptives does not appear to be associated with an increased risk. Data on the effects of long term use are scarce."
A recent Italian case control study of women with hepatocellular carcinoma has suggested that the relative risk of hepatocellular carcinoma is 2.2 for oral contraceptive users compared to women who never used oral contraceptives.
A similar American case control study from 1989 also reported a strong association between oral contraceptive use and hepatocellular carcinoma but concluded that: "If this observed association is causal, the actual number of cases of liver cancer in the United States attributable to oral contraceptive use is small. Therefore, these findings do not have public health importance in the United States and other Western nations."[Ref]
Hepatic side effects have included focal nodular hyperplasia, intrahepatic cholestasis, liver cell adenomas, hepatic granulomas, hepatic hemangiomas and well differentiated hepatocellular carcinomas, which have been reported rarely in association with estrogen therapy and therapy with oral contraceptive combinations.[Ref]
Cases of venous thrombosis, pulmonary embolism (sometimes fatal), and arterial thrombosis have been reported rarely.
Previous thrombotic disease is considered a contraindication to use of oral contraceptive combinations.[Ref]
A hematologic concern has been the risk of thromboembolism associated with exogenous estrogens. Because the dose of exogenous estrogens is low in most commercially available preparations, the risk of thromboembolism is minimal for most women. Risk is greater in women who are over age 35, smoke, and/or with a history of previous thrombotic diseases. The incidence of venous thrombosis in women with inherited clotting defects has been greater and developed sooner (within the first six months to one year of therapy).[Ref]
A common genitourinary side effect has been breakthrough bleeding and spotting, especially during the first several cycles of oral contraceptive use. Nonhormonal causes of such bleeding should be excluded. In addition, oral contraceptive use may cause conception delay.[Ref]
Some women have experienced oligomenorrhea and amenorrhea following termination or oral contraceptive use.[Ref]
Psychiatric side effects have included depression and precipitation of panic disorder.[Ref]
Immunologic side effects have included rare cases of oral contraceptive induced systemic lupus erythematosus.[Ref]
Nervous system side effects have been rare. A case of chorea has been reported in association with oral contraceptives.[Ref]
Ocular side effects have included rare cases of retinal thrombosis. In addition, the manufacturers of oral contraceptive products report that some patients have developed changes in contact lens tolerance.[Ref]
A case of fatal pulmonary venooclusive disease has been reported.[Ref]
Despite the potentially adverse effects of oral contraceptives on lipid levels and glucose tolerance, some investigators have suggested that young diabetic women without existing vascular disease or severe lipidemias may be candidates for low dose oral contraceptive combinations with appropriate clinical monitoring of patient response and tolerance.[Ref]
Metabolic side effects have resulted in altered carbohydrate metabolism. The suggested effect that oral contraceptive combinations may have on glucose tolerance has been varied. Decreased glucose tolerance has been observed, however, studies with low dose preparations have suggested that decreased glucose tolerance due to oral contraceptive combinations generally has been minimal.[Ref]
1. Petitti DB, Sidney S, Bernstein A, Wolf S, Quesenberry C, Ziel HK "Stroke in users of low-dose oral contraceptives." N Engl J Med 335 (1996): 8-15
2. Poulter NR, Chang CL, Farley TMM, Meirik O, Marmot MG "Haemorrhagic stroke, overall stroke risk, and combined oral contraceptives: results of an international, multicentre, case-control study." Lancet 348 (1996): 505-10
3. Lidegaard O "Oral contraception and risk of a cerebral thromboembolic attack: results of a case-control study." BMJ 306 (1993): 956-63
4. Derman RJ "Oral contraceptives and cardiovascular risk. Taking a safe course of action." Postgrad Med 88 (1990): 119-22
5. Peterson HB, Lee NC "Long-term health risks and benefits of oral contraceptive use." Obstet Gynecol Clin North Am 17 (1990): 775-88
6. Derman R "Oral contraceptives: a reassessment." Obstet Gynecol Surv 44 (1989): 662-8
7. Vandenbroucke JP, Bloemenkamp KWM, Helmerhorst FM, Rosendaal FR "Oral contraceptives and mortality from venous thromboembolism - reply." Lancet 348 (1996): 1096-7
8. Thorogood M "Risk of stroke in users of oral contraceptives." JAMA 281 (1999): 1255-6
9. Rosenberg L, Palmer JR, Lesko SM, Shapiro S "Oral contraceptive use and the risk of myocardial infarction." Am J Epidemiol 131 (1990): 1009-16
10. Thorogood M, Mann J, Murphy M, Vessey M "Fatal stroke and use of oral contraceptives: findings from a case- control study." Am J Epidemiol 136 (1992): 35-45
11. Mishell DR "Contraception." N Engl J Med 320 (1989): 777-85
12. Williams RS "Benefits and risks of oral contraceptive use." Postgrad Med 92 (1992): 155-7
13. Farley TMM, Meirik O, Poulter NR, Chang CL, Marmot MG "Oral contraceptives and thrombotic diseases: impact of new epidemiological studies." Contraception 54 (1996): 193-5
14. Poulter NR, Chang CL, Farley TMM, Meirik O, Marmot MG, Debertribeiro M, Medina E, Artigas J, Shen H, Zhong YH, Zhang DW, "Ischaemic stroke and combined oral contraceptives: results of an international, multicentre, case-control study." Lancet 348 (1996): 498-505
15. Hannaford PC, Croft PR, Kay CR "Oral contraception and stroke. Evidence from the Royal College of General Practitioners' Oral Contraception Study." Stroke 25 (1994): 935-42
16. Levine AB, Teppa J, Mcgough B, Cowchock FS "Evaluation of the prethrombotic state in pregnancy and in women using oral contraceptives." Contraception 53 (1996): 255-7
17. Archer DF, Maheux R, DelConte A, OBrien FB "Efficacy and safety of a low-dose monophasic combination oral contraceptive containing 100 mu g levonorgestrel and 20 mu g ethinyl estradiol (Alesse (R))." Am J Obstet Gynecol 181 (1999): s39-44
18. Norris LA, Bonnar J "The effect of oestrogen dose and progestogen type on haemostatic changes in women taking low dose oral contraceptives." Br J Obstet Gynaecol 103 (1996): 261-7
19. Piegsa K, Guillebaud J "Oral contraceptives and the risk of DVT." Practitioner 240 (1996): 544
20. Leaf DA, Bland D, Schaad D, Neighbor WE, Scott CS "Oral contraceptive use and coronary risk factors in women." Am J Med Sci 301 (1991): 365-8
21. Speroff L "Oral contraceptives and venous thromboembolism." Int J Gynaecol Obstet 54 (1996): 45-50
22. Steinberg WM "Oral contraception: risks and benefits." Adv Contracept 5 (1989): 219-28
23. Thorneycroft IH "Oral contraceptives and myocardial infarction." Am J Obstet Gynecol 163 (1990): 1393-7
24. Farmer R, Lewis M "Oral contraceptives and mortality from venous thromboembolism." Lancet 348 (1996): 1095
25. Martinelli I, Rosendaal FR, Vandenbroucke JP, Mannucci PM "Oral contraceptives are a risk factor for cerebral vein thrombosis." Thromb Haemost 76 (1996): 477-8
26. "Oral contraceptives and neoplasia. WHO Scientific Group." World Health Organ Tech Rep Ser 817 (1992): 1-46
27. "Product Information. Ortho-Novum (oral contraceptive combination pill)." Ortho Pharmaceutical Corporation, Raritan, NJ.
28. Lanes SF, Birmann B, Walker AM, Singer S "Oral contraceptive type and functional ovarian cysts." Am J Obstet Gynecol 166 (1992): 956-61
29. Friedman AJ, Wheeler JM "Incidence of ovarian cyst formation in women taking ethynodiol diacetate, 1mg, with ethinyl estradiol, 35 micrograms." J Reprod Med 36 (1991): 345-9
30. John EM, Whittemore AS, Harris R, Itnyre J "Characteristics relating to ovarian cancer risk: collaborative analysis of seven U.S. case-control studies. Epithelial ovarian cancer in black women. Collaborative Ovarian Cancer Group." J Natl Cancer Inst 85 (1993): 142-7
31. Colditz GA "Oral contraceptive use and mortality during 12 years of follow-up: the Nurses' Health Study." Ann Intern Med 120 (1994): 821-6
32. Grimes DA "The safety of oral contraceptives: epidemiologic insights from the first 30 years." Am J Obstet Gynecol 166 (1992): 1950-4
33. Burkman RT Jr "Benefits and risk of oral contraceptives. A reassessment." J Reprod Med 36 (1991): 217-8
34. Hankinson SE, Colditz GA, Hunter DJ, Spencer TL, Rosner B, Stampfer MJ "A quantitative assessment of oral contraceptive use and risk of ovarian cancer." Obstet Gynecol 80 (1992): 708-14
35. Holt VL, Daling JR, McKnight B, Moore D, Stergachis A, Weiss NS "Functional ovarian cysts in relation to the use of monophasic and triphasic oral contraceptives." Obstet Gynecol 79 (1992): 529-33
36. Gross TP, Schlesselman JJ "The estimated effect of oral contraceptive use on the cumulative risk of epithelial ovarian cancer." Obstet Gynecol 83 (1994): 419-24
37. Shoupe D "Multicenter randomized comparative trial of two low-dose triphasic combined oral contraceptives containing desogestrel or norethindrone." Obstet Gynecol 83 (1994): 679-85
38. Reisman H, Martin D, Gast MJ "A multicenter randomized comparison of cycle control and laboratory findings with oral contraceptive agents containing 100 mu g levonorgestrel with 20 mu g ethinyl estradiol or triphasic norethindrone with ethinyl estradiol." Am J Obstet Gynecol 181 (1999): s45-52
39. Boerrigter PJ, Ellman H, Dolker M "International clinical experience with a new low-dose, monophasic oral contraceptive containing levonorgestrel 100 mu g and ethinyl estradiol 20 mu g." Clin Ther 21 (1999): 118-27
40. Waltimo J "Geographic tongue during a year of oral contraceptive cycles." Br Dent J 171 (1991): 94-6
41. Oren R, Fich A "Oral contraceptive-induced esophageal ulcer. Two cases and literature review." Dig Dis Sci 36 (1991): 1489-90
42. Brinton LA "Oral contraceptives and cervical neoplasia." Contraception 43 (1991): 581-95
43. Sillero-Arenas M, Rodriguez-Contreras R, Delgado-Rodriguez M, Bueno-Cavanillas A, Galvez-Vargas R "Patterns of research. Oral contraceptives and cervical cancer." Acta Obstet Gynecol Scand 70 (1991): 143-8
44. Ewertz M "Oral contraceptives and breast cancer risk in Denmark." Eur J Cancer 28A (1992): 1176-81
45. Zondervan KT, Carpenter LM, Painter R, Vessey MP "Oral contraceptives and cervical cancer - further findings from the oxford family planning association contraceptive study." Br J Cancer 73 (1996): 1291-7
46. Olsson H, Moller TR, Ranstam J "Early oral contraceptive use and breast cancer among premenopausal women: final report from a study in southern Sweden." J Natl Cancer Inst 81 (1989): 1000-4
47. Rettig BA, Lemon HM "Cancers related to contraceptive use." Br J Cancer 74 (1996): 1509-10
48. Rosenberg L, Palmer JR, Clarke EA, Shapiro S "A case-control study of the risk of breast cancer in relation to oral contraceptive use." Am J Epidemiol 136 (1992): 1437-44
49. Jones MW, Silverberg SG "Cervical adenocarcinoma in young women: possible relationship to microglandular hyperplasia and use of oral contraceptives." Obstet Gynecol 73 (1989): 984-9
50. Calle EE, Heath CW, Miraclemcmahill HL, Coates RJ, Liff JM, Franceschi S, Talamini R, Chantarakul N, Koetsawang S, Rachawat D "Breast cancer and hormonal contraceptives: further results." Contraception 54 (suppl (1996): s1-106
51. Turnquest MA "Oral contraceptive use and incidence of cervical intraepithelial neoplasia." Am J Obstet Gynecol 168 (1993): 1895-6
52. Lavecchia C, Negri E, Franceschi S, Talamini R, Amadori D, Filiberti R, Conti E, Montella M, Veronesi A, Parazzini F, Ferraroni M "Oral contraceptives and breast cancer: a cooperative italian study." Int J Cancer 60 (1995): 163-7
53. Romieu I, Willett WC, Colditz GA, Stampfer MJ, Rosner B, Hennekens CH, Speizer FE "Prospective study of oral contraceptive use and risk of breast cancer in women." J Natl Cancer Inst 81 (1989): 1313-21
54. Kaunitz AM "Oral contraceptives and gynecologic cancer: an update for the 1990s." Am J Obstet Gynecol 167 (1992): 1171-6
55. Schlesselman JJ "Oral contraceptives and breast cancer." Am J Obstet Gynecol 163 (1990): 1379-87
56. Thomas DB "Oral contraceptives and breast cancer: review of the epidemiologic literature." Contraception 43 (1991): 597-642
57. Delgado-Rodriguez M, Sillero-Arenas M, Martin-Moreno JM, Galvez-Vargas R "Oral contraceptives and cancer of the cervix uteri. A meta-analysis." Acta Obstet Gynecol Scand 71 (1992): 368-76
58. Lund E "Oral contraceptives and breast cancer. A review with some comments on mathematical models." Acta Oncol 31 (1992): 183-6
59. Murray PP, Stadel BV, Schlesselman JJ "Oral contraceptive use in women with a family history of breast cancer." Obstet Gynecol 73 (1989): 977-83
60. Miller DR, Rosenberg L, Kaufman DW, Stolley P, Warshauer ME, Shapiro S "Breast cancer before age 45 and oral contraceptive use: new findings." Am J Epidemiol 129 (1989): 269-80
61. Kjaer K, Hagen C, Sando SH, Eshoj O "Contraception in women with IDDM. An epidemiological study." Diabetes Care 15 (1992): 1585-90
62. Spellacy WN, Ellingson AB, Tsibris JC "The effects of two triphasic oral contraceptives on carbohydrate metabolism in women during 1 year of use." Fertil Steril 51 (1989): 71-4
63. Godsland IF, Crook D "Update on the metabolic effects of steroidal contraceptives and their relationship to cardiovascular disease risk." Am J Obstet Gynecol 170 (1994): 1528-36
64. Burkman RT, Zacur HA, Kimball AW, Kwiterovich P, Bell WR "Oral contraceptives and lipids and lipoproteins: Part I--Variations in mean levels by oral contraceptive type." Contraception 40 (1989): 553-61
65. Garg SK, Chase HP, Marshall G, Hoops SL, Holmes DL, Jackson WE "Oral contraceptives and renal and retinal complications in young women with insulin-dependent diabetes mellitus." JAMA 271 (1994): 1099-102
66. Bracken MB, Hellenbrand KG, Holford TR "Conception delay after oral contraceptive use: the effect of estrogen dose." Fertil Steril 53 (1990): 21-7
67. Janaud A, Rouffy J, Upmalis D, Dain MP "A comparison study of lipid and androgen metabolism with triphasic oral contraceptive formulations containing norgestimate or levonorgestrel." Acta Obstet Gynecol Scand Suppl 156 (1992): 33-8
68. Stubblefield PG "Choosing the best oral contraceptive." Clin Obstet Gynecol 32 (1989): 316-28
69. Hannaford PC, Kay CR "Oral contraceptives and diabetes mellitus." BMJ 299 (1989): 1315-6
70. Miwa LJ, Edmunds AL, Shaefer MS, Raynor SC "Idiopathic thromboembolism associated with triphasic oral contraceptives." DICP 23 (1989): 773-5
71. Conter RL, Longmire WP Jr "Recurrent hepatic hemangiomas. Possible association with estrogen therapy." Ann Surg 207 (1988): 115-9
72. Aldinger K, Ben-Menachem Y, Whalen G "Focal nodular hyperplasia of the liver associated with high-dosage estrogens." Arch Intern Med 137 (1977): 357-9
73. Mooney MJ, Nyreen MR, Hall RA, Carter PL "Hepatic adenoma presenting as a right lower quadrant mass." Am Surg 59 (1993): 229-31
74. Weden M, Glaumann H, Einarsson K "Protracted cholestasis probably induced by oral contraceptive." J Intern Med 231 (1992): 561-5
75. Tao LC "Oral contraceptive-associated liver cell adenoma and hepatocellular carcinoma." Cancer 68 (1991): 341-7
76. Le Bail B, Jouhanole H, Deugnier Y, Salame G, Pellegrin JL, Saric J, Balabaud C, Bioulac-Sage P "Liver adenomatosis with granulomas in two patients on long-term oral contraceptives." Am J Surg Pathol 16 (1992): 982-7
77. Gyorffy EJ, Bredfeldt JE, Black WC "Transformation of hepatic cell adenoma to hepatocellular carcinoma due to oral contraceptive use." Ann Intern Med 110 (1989): 489-90
78. Mathieu D, Zafrani ES, Anglade MC, Dhumeaux D "Association of focal nodular hyperplasia and hepatic hemangioma." Gastroenterology 97 (1989): 154-7
79. Tavani A, Negri E, Parazzini F, Franceschi S, La Vecchia C "Female hormone utilisation and risk of hepatocellular carcinoma." Br J Cancer 67 (1993): 635-7
80. Palmer JR, Rosenberg L, Kaufman DW, Warshauer ME, Stolley P, Shapiro S "Oral contraceptive use and liver cancer." Am J Epidemiol 130 (1989): 878-82
81. Beaumont V, Lemort N, Beaumont JL "Oral contraceptives, sex steroid-induced antibodies and vascular thrombosis: results from 1318 cases." Eur Heart J 12 (1991): 1219-24
82. Lidegaard O "Oral contraceptives, pregnancy and the risk of cerebral thromboembolism: the influence of diabetes, hypertension, migraine and previous thrombotic disease." Br J Obstet Gynaecol 102 (1995): 153-9
83. Archer DF, Mammen EF, Grubb GS "The effects of a low-dose monophasic preparation of levonorgestrel and ethinyl estradiol on coagulation and other hemostatic factors." Am J Obstet Gynecol 181 (1999): s63-6
84. Key JD, Hammill WW, Everett L "Pulmonary embolus in an adolescent on oral contraceptives." J Adolesc Health 13 (1992): 713-5
85. Bloemenkamp KW, Rosendaal FR, Helmerhorst FM, Vandenbroucke JP "Higher risk of venous thrombosis during early use of oral contraceptives in women with inherited clotting defects." Arch Intern Med 160 (2000): 49-52
86. Ushiroyama T, Okamoto Y, Toyoda K, Sugimoto O "A case of panic disorder induced by oral contraceptive." Acta Obstet Gynecol Scand 71 (1992): 78-80
87. Deci PA, Lydiard RB, Santos AB, Arana GW "Oral contraceptives and panic disorder." J Clin Psychiatry 53 (1992): 163-5
88. Iskander MK, Khan M "Chorea as the initial presentation of oral contraceptive related systemic lupus erythematosus." J Rheumatol 16 (1989): 850-1
89. Julkunen H, Kaaja R, Jouhikainen T, Teppo AM, Friman C "Malignant hypertension and antiphospholipid antibodies as presenting features of SLE in a young woman using oral contraceptives." Br J Rheumatol 30 (1991): 471-2
90. Omdal R, Roalso S "Chorea gravidarum and chorea associated with oral contraceptives-- diseases due to antiphospholipid antibodies?" Acta Neurol Scand 86 (1992): 219-20
91. Young RL, DelConte A "Effects of low-dose monophasic levonorgestrel with ethinyl estradiol preparation on serum lipid levels: A twenty-four-month clinical trial." Am J Obstet Gynecol 181 (1999): s59-62
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