Vienva is a combination birth control pill used to prevent pregnancy. Each pack contains 21 active tablets with two hormones (a synthetic progestin and a synthetic estrogen) plus 7 inactive tablets, taken over a 28-day cycle. It is a low-dose oral contraceptive, with each active pill containing 0.1 mg of levonorgestrel and 0.02 mg of ethinyl estradiol.
How Vienva Prevents Pregnancy
Vienva works through several mechanisms at once. The primary one is suppressing ovulation, so your ovaries don’t release an egg each month. It also thickens cervical mucus, making it harder for sperm to reach an egg. These combined effects are what make the pill reliable when taken consistently.
With perfect use, meaning you take the pill at the same time every day without missing a dose, combination pills like Vienva have a failure rate of just 0.3% in the first year. With typical use, which accounts for missed pills and late doses, the failure rate rises to about 9%. That gap highlights how much consistency matters with this type of contraception.
What Vienva Is Not Approved For
Some combination birth control pills carry additional FDA approvals for treating acne or symptoms related to conditions like endometriosis. Vienva is not one of them. Its only approved use is pregnancy prevention. While your provider may prescribe it with other goals in mind, such as regulating periods, the prescribing information does not list any secondary indications.
How to Take It
A Vienva pack has 21 white active pills followed by 7 peach inactive pills. You take one pill per day, ideally at the same time each day. Your period will typically arrive during the week you’re taking the inactive pills. Once you finish all 28 tablets, you start a new pack the next day with no gap between packs.
You can begin your first pack on one of two schedules. “Day 1 starters” take their first pill on the first day of their period. “Sunday starters” begin on the first Sunday after their period starts. If you’re a Sunday starter, you’ll need backup contraception (like condoms) for the first seven days.
What to Do If You Miss a Pill
Missing even one active pill increases your risk of pregnancy, so the protocol varies depending on how many pills you’ve missed and when in the pack it happened. In all cases, use a backup method like condoms for seven days after restarting your pills.
- 1 missed pill: Take it as soon as you remember, even if that means taking two pills in one day. Then continue the rest of the pack normally.
- 2 missed pills in Week 1 or Week 2: Take two pills the day you remember and two pills the next day. Then take one pill per day until you finish the pack.
- 2 missed pills in Week 3: If you’re a Day 1 starter, throw out the rest of the pack and start a new one that same day. If you’re a Sunday starter, keep taking one pill daily until Sunday, then discard the pack and start fresh. You may not get a period that month.
- 3 or more missed pills: Follow the same instructions as missing 2 pills in Week 3. Discard the current pack and start a new one based on your start day.
If you miss your period two months in a row after missing pills, take a pregnancy test.
Common Side Effects
The most frequently reported side effects of Vienva are nausea, vomiting, spotting or bleeding between periods, weight gain, breast tenderness, and trouble wearing contact lenses. These tend to be most noticeable in the first three months. For many users, nausea and vomiting improve as the body adjusts to the hormones.
Other side effects that can show up include mood changes (including depression), changes in sex drive, bloating or abdominal cramps, headaches, dizziness, hair thinning, and skin discoloration that may persist even after stopping the pill. Changes in menstrual flow, whether lighter, heavier, or absent, are also reported. Some users experience acne as a side effect rather than an improvement, which sets Vienva apart from pills specifically formulated to treat breakouts.
Who Should Not Take Vienva
Combination birth control pills carry a well-established risk of blood clots, and that risk climbs significantly for people who smoke and are over 35. This is the most important safety consideration with Vienva. If you smoke and are 35 or older, combination pills are not a safe option.
Vienva is also not appropriate for people with a history of blood clots, certain heart valve conditions, stroke, or uncontrolled high blood pressure. Liver disease, hormone-sensitive cancers (such as breast cancer), and unexplained vaginal bleeding are additional contraindications. If you have migraines with aura, combination pills can increase your stroke risk, so a progestin-only method is typically a better fit.
Medications That Can Reduce Effectiveness
Certain medications speed up how your liver processes hormones, which can lower the amount of active hormone in your bloodstream and make the pill less effective. The most common culprits are some anti-seizure medications, certain drugs used to treat HIV, and the antibiotic rifampin (used primarily for tuberculosis). The herbal supplement St. John’s wort can also interfere.
Standard antibiotics like amoxicillin or azithromycin, the kind prescribed for sinus infections or strep throat, do not reduce the pill’s effectiveness despite the persistent myth. If you’re starting a new medication, let your prescriber know you’re on Vienva so they can flag any interactions.
How Vienva Compares to Similar Pills
Vienva is a generic equivalent of Levlen and Aubra, meaning it contains the same hormones at the same doses. You may also see the brand names Levora, Altavera, Marlissa, or Chateal, all of which share the same formulation. Switching between these is generally seamless because the active ingredients are identical. The differences come down to manufacturer, price, and which ones your pharmacy or insurance plan carries.
Because Vienva contains only 0.02 mg of ethinyl estradiol, it sits on the lower end of the estrogen spectrum for combination pills. Lower estrogen doses are associated with fewer estrogen-related side effects like bloating and breast tenderness, though they can also make breakthrough bleeding more likely, especially in the first few cycles.