STD Home > Answers to Questions on Vestura

Drug Interactions

Vestura may react with a number of other medications (see Drug Interactions With Vestura).
 

What If I Take an Overdose?

Women who take too much Vestura may experience the following symptoms:
 
  • Nausea
  • Vomiting
  • Vaginal bleeding
  • Other menstrual irregularities
  • High blood potassium (hyperkalemia).
 
(Click Yaz Overdose for more information.)
 

What If I Miss a Dose of Vestura?

Missing doses of Vestura increases the risk of pregnancy. What you should do depends on how many tablets you have missed and where exactly you are in your cycle (see Vestura Dosage). Refer to the patient information that comes with each package for more information on what to do, or consult your healthcare provider.
 

How Does This Contraceptive Work?

Vestura is a combination oral contraceptive that contains an estrogen and a progestin. The drug primarily prevents pregnancy by stopping ovulation (the maturation and release of eggs from the ovaries).
 
However, it also prevents pregnancy in two other, minor ways. Vestura alters the cervical mucus (the fluid of the cervix, which is the lower, narrow part of the uterus that is connected to the vagina), making it more difficult for sperm to enter the uterus. It also alters the lining of the uterus (the endometrium), making it less receptive to an embryo.
 
Vestura is different from traditional birth control pills in two important ways. First, the progestin that it uses (drospirenone) is closely related to spironolactone, a medication used as a diuretic ("water pill"). Drospirenone has anti-androgenic activity, which means that it works against testosterone and other "male" hormones. All women have a small amount of these hormones, which can cause acne and other problems. Also, drospirenone may increase the level of potassium in your blood, which can be a problem for some women.
 
Second, Vestura contains 24 active pills and 4 inactive pills (these do not contain any active ingredients). In comparison, traditional birth control pills have 21 active pills and 7 inactive pills. Having fewer inactive pills seems to decrease some of the bothersome symptoms that occur just before and during your period.
 
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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