Each blister pack of 28 tablets contains 24 pink active pills containing drospirenone 3 mg, ethinylestradiol 20 mcg, and levomefolate calcium 0.451 mg and four light orange inactive pills containing of levomefolate calcium 0.451 mg.One tablet is taken by mouth at the same time every day. The failure rate may increase when pills are missed or taken incorrectly. Single missed pills should be taken as soon as remembered. It is important to know that when experiencing stomach upset in the form of diarrhea or vomiting (within 3–4 hours of taking), backup contraception methods should be utilized to account for possible absorption failure. Side effects
Adverse reactions commonly reported by combined oral contraceptive users are irregular uterine bleeding, nausea, breast tenderness, and headache. Interactions
Decreased efficacy
Drugs or herbal products that induce certain enzymes, including CYP3A4, may decrease the effectiveness of COCs or increase breakthrough bleeding. Some drugs or herbal products that may decrease the effectiveness of hormonal contraceptives include phenytoin, barbiturates, carbamazepine, bosentan, felbamate, griseofulvin, oxcarbazepine, rifampicin, topiramate and products containing St. John’s wort.
Convex or convexity may refer to:

Science and technology
Convex lens, in optics

Mathematics
Convex set, containing the whole line segment that joins points
Convex polygon, a polygon which encloses a convex set of points
Convex polytope, a polytope with a convex set of points
Convex metric space, a generalization of the convexity notion in abstract metric spaces
Convex function, when the line segment between any two points on the graph of the function lies above or on the graph
Convex conjugate, of a function
Convexity (algebraic geometry), a restrictive technical condition for algebraic varieties originally introduced to analyze Kontsevich moduli spaces

Economics and finance
Convexity (finance), second derivatives in financial modeling generally
Convexity in economics
Bond convexity, a measure of the sensitivity of the duration of a bond to changes in interest rates
Convex preferences, an individuals ordering of various outcomes

Other uses
Convex Computer, a former company that produced supercomputers

See also
List of convexity topics
Non-convexity (economics), violations of the convexity assumptions of elementary economics
Obtuse angle
All pages with titles beginning with Convex