Impact of Oral Contraceptives on Cholesterol Levels

Effects on Specific Lipid Parameters

Oral contraceptive users experience significantly greater increases in triglycerides (20-30% on average, but up to 57% in some populations), total cholesterol, very-low-density lipoprotein (VLDL) cholesterol, and high-density lipoprotein (HDL) cholesterol compared to non-hormonal contraceptive users 1, 2
Triglyceride increases are consistently observed across multiple studies, with levels typically 20-30% higher in OC users compared to non-users 1, 2

The lipid metabolic effects of oral contraceptives vary based on their estrogen and progestin content 1, 2
Older generation OCs with higher estrogen doses showed more pronounced effects on lipid profiles compared to newer formulations with lower estrogen content (15-35 μg of ethinyl estradiol) 3
Orally administered exogenous estrogens increase triglyceride levels, whereas exogenously administered progestins tend to ameliorate this estrogen-induced hypertriglyceridemia 1, 4

Despite these changes, screening for hyperlipidemia before initiation of hormonal contraceptives is not necessary according to guidelines, due to the low prevalence of undiagnosed disease in women of reproductive age 5, 6, 7
The clinical significance of OC-induced changes in lipid levels remains unclear, with studies showing mixed results about the effects of hormonal methods on lipid levels 5, 6
For postmenopausal women with hypertriglyceridemia who require hormone preparations, switching to transdermal preparations may blunt the triglyceride increases observed with oral compounds 4
For women with hyperlipidemias, combined hormonal contraceptives should be used with caution (U.S. MEC 2/3, depending on the type and severity of the hyperlipidemia and presence of other cardiovascular risk factors) 5, 6

Women with abnormal lipid levels at baseline were not found to have increased risk for adverse changes to their lipid profile when using hormonal methods 6, 7
For women with hypertriglyceridemia who develop it while taking oral contraceptive therapy, lower estrogen-containing preparations or other forms of contraception should be considered 4