UMLS. CSP-HL7-ICD9CM-NCI-NDFRT-RXNORM
%
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
O O- O0 O1 O2 O3 OA OB OC OD OE OF OG OH OI OJ OK OL OM ON OO OP OR OS OT OU OV OW OX OY OZ
OR ORA ORB ORC ORD ORE ORF ORG ORI ORL ORM ORN ORO ORP ORR ORS ORT ORU ORY ORZ

Oral Contraceptive Preparation

[Orally administered synthetic sex hormones with contraceptive activity. The oral contraceptive preparation contains a combination of an estrogen, such as ethinyl estradiol, and a progestagen, such as levonorgestrel or norethidrone. The oral contraceptive prevents pregnancy by preventing ovulation and by inducing endometrial and cervical changes undesirable for fertilization and implantation. ( NCI )]
UMLS (NCI) C0009906
 
Pharmacologic Substance

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