FACULTY OF SEXUAL & REPRODUCTIVE HEALTHCARE
Faculty of Sexual & Reproductive Healthcare Clinical Guidance
Drug Interactions with Hormonal Contraception Clinical Effectiveness Unit January 2011
ISSN 1755-103X ABBREVIATIONS USED
BNF British National Formulary CEU Clinical Effectiveness Unit CHC combined hormonal contraception COC combined oral contraceptive Cu-IUD copper-bearing intrauterine device DMPA depot medroxyprogesterone acetate EC emergency contraception EE ethinylestradiol FSRH Faculty of Sexual and Reproductive Healthcare HIV human immunodeficiency virus LNG levonorgestrel LNG-IUS levonorgestrel-releasing intrauterine system NET-EN norethisterone enantate PEPSE post-exposure prophylaxis after sexual exposure to HIV POP progestogen-only pill SPC Summary of Product Characteristics UKMEC UK Medical Eligibility for Contraceptive Use UPA ulipristal acetate UPSI unprotected sexual intercourse USMEC U.S. Medical Eligibility Criteria for Contraceptive Use WHOMEC World Health Organization Medical Eligibility for Contraceptive Use
GRADING OF RECOMMENDATIONS
A Evidence based on randomised controlled trials
B Evidence based on other robust experimental or observational studies
C Evidence is limited but the advice relies on expert opinion and has the endorsement of respected authorities