DROSPIRENONE AND ESTRADIOL

AbsorptionThe absolute bioavailability of DRSP from a single entity tablet is about 76%. The absolute bioavailability of EE is approximately 40% as a result of presystemic conjugation and first-pass metabolism . The absolute bioavailability of Yaz , which is a combination tablet of DRSP and EE stabilized by betadex as a clathrate (molecular inclusion complex), has not been evaluated. The bioavailability of EE is similar when dosed via a betadex clathrate formulation compared to when it is dosed...

14.1 Oral Contraceptive Clinical Trial In the primary contraceptive efficacy study of Yaz (3 mg DRSP/0.02 mg EE) of up to 1 year duration, 1,027 subjects were enrolled and completed 11,480 28-day cycles of use. The age range was 17 to 36 years. The racial demographic was: 87.8% Caucasian, 4.6% Hispanic, 4.3% Black, 1.2% Asian, and 2.1% other. Women with a BMI greater than 35 were excluded from the trial. The pregnancy rate (Pearl Index) was 1.41 (95% CI [0.73, 2.47]) per 100 woman-years of use based on 12 pregnancies that occurred after the onset of treatment and within 14 days after the last ...

The following serious adverse reactions with the use of COCs are discussed elsewhere in the labeling:

• Serious cardiovascular events and stroke [see Boxed Warning and Warnings and Precautions ( 5.1 )]
• Vascular events [see Warnings and Precautions ( 5.1 )]
• Liver disease [see Warnings and Precautions ( 5.4 )]
• The most frequent adverse reactions (≥ 2%) in contraception and acne clinical trials were: headache/migraine (6.7%), menstrual irregularities (4.7%), nausea/vomiting (4.2%), breast pai...

Yaz is contraindicated in females who are known to have or develop the following conditions:

• Renal impairment
• Adrenal insufficiency
• A high risk of arterial or venous thrombotic diseases. Examples include women who are known to:
• Smoke, if over age 35 [see Boxed Warning and Warnings and Precautions ( 5.1 )]
• Have deep vein thrombosis or pulmonary embolism, now or in the past [see Warnings a...

• Vascular risks : Stop Yaz if a thrombotic event occurs. Stop at least 4 weeks before and through 2 weeks after major surgery. Start no earlier than 4 weeks after delivery, in women who are not breastfeeding. (5.1) COCs containing DRSP may be associated with a higher risk of venous thromboembolism (VTE) than COCs containing levonorgestrel or some other progestins. Before initiating Yaz in a new COC user or a woman who is switching from a contraceptive that does not contain DRSP, consider the ri...

7 DRUG INTERACTIONS Consult the labeling of all concurrently-used drugs to obtain further information about interactions with hormonal contraceptives or the potential for enzyme alterations . Drugs or herbal products that induce certain enzymes (for example, CYP3A4) may decrease the effectiveness of COCs or increase breakthrough bleeding. Counsel patients to use a back-up or alternative method of ...