Interação entre Drospirenona + etinilestradiol e Noretisterona

CONTRAINDICATIONS Progestin-only oral contraceptives (POPs) should not be used by women who currently have the following conditions: • Known or suspected pregnancy • Known or suspected carcinoma of the breast.

Norethindrone tablets do not contain estrogen and, therefore, this insert does not discuss the serious health risks that have been associated with the estrogen component of combined oral contraceptives (COCs).

The healthcare professional is referred to the prescribing information of combined oral contraceptives for a discussion of those risks.

The relationship between progestin-only oral contraceptives and these risks is not fully defined.

Irregular Genital Bleeding Irregular menstrual patterns are common among women using progestin-only oral contraceptives.

…contraception for at least the prior 6 months All COCs available in the US during the conduct of the study Includes low-dose COCs containing the following progestins: norgestimate, norethindrone, levonorgestrel, desogestrel, norgestrel, medroxyprogesterone, or ethynodiol diacetate HR: 0.9 (0.5-1.6) EURAS (Dinger 2007) Initiators, including new users All COCs available…

New users Other COCs available during the course of the study Includes low-dose COCs containing the following progestins: norgestimate, norethindrone, or levonorgestrel HR: 1.8 (1.3-2.4) Levonorgestrel/0.03 mg EE HR: 1.6 (1.1-2.2) All users (i.e., initiation and continuing use of study combination hormonal contraception) Other COCs available during the course…

COCs containing DRSP may be associated with a higher risk of venous thromboembolism (VTE) than COCs containing levonorgestrel or some other progestins.

Effects of Other Drugs on Combined Oral Contraceptives Substances diminishing the efficacy of COCs: Drugs or herbal products that induce certain enzymes, including cytochrome P450 3A4 (CYP3A4), may decrease the effectiveness of COCs or increase breakthrough bleeding.