Briellyn is a combined birth control pill. It’s got both estrogen and progestin so if you’re looking for a progestin-only pill, the mini pill might be a better option for you.
You take Briellyn every day. It comes with three weeks of active pills containing hormones and one week of inactive pills, which are designed to keep you in your daily habit. When taken consistently, Briellyn is highly effective at preventing pregnancy.
Is Briellyn generic?
Yes, Briellyn is a generic version of Ovcon 35 and is made by Glenmark Pharmaceuticals. Briellyn and Ovcon 35 are bioequivalent, which means they contain the same active ingredients in the same amounts. So they’re both equally effective at preventing pregnancy and have the same interactions and potential side effects.
Since the company that makes them is different, you’re likely to see different packaging and pill colors. The price will also likely be different — generic medications are generally cheaper than their brand-name counterparts.
How Briellyn works
Briellyn changes your hormone levels, which affects how your body prepares for pregnancy every month. The two hormones it contains, norethindrone acetate and ethinyl estradiol, are synthetic versions of the progesterone and estrogen your body produces naturally.
When you take hormonal birth control, you’ll be protected from pregnancy in three ways. The hormones stop ovulation, the once-monthly action where your ovaries release an egg. They also impact the lining of your uterus, which normally becomes thicker every month in preparation for the egg. Thirdly, the hormones create a physical barrier against sperm by changing the consistency of your cervical fluid to something more difficult to swim through.
This page was written by The Treated Content Team.
This page was medically reviewed by Dr Alexandra Cristina Cowell on August 25, 2025. Next review due on August 25, 2028.
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
BriellynNorethindrone Acetate/Ethinyl Estradiol
How to take Briellyn
To keep your protection level as high as possible, you’ll want to take Briellyn at the same time every day. Pick out a time that’s convenient for you before starting your pack, so you’re not having to use a back-up birth control like condoms to adjust the time.
You can take Briellyn with food but you don’t need to. It’s possible you’ll experience a bit of nausea when starting to take hormonal birth control, though, so try Briellyn with a small meal or a snack if that happens to you.
Your pack has three weeks of active pills and one week of inactive pills, which will be different colors. Take the whole pack before starting a new one.
What is the effectiveness of Briellyn?
Briellyn is around 99% effective when taken “perfectly,” which means at the same time, every day.[1] Taking your pill late or missing a pill lowers how protected you are, which is why it’s so important to pick a schedule that works for you and stick with it.
If you don’t like the idea of taking a pill every day, there are other hormonal birth control methods like the ring and the patch you can try, which require a bit less maintenance.
I missed a Briellyn pill. Now what?
If you miss a pill, it’s important that you get back on track as quickly as possible. Instructions on what to do if you miss a pill are in the package insert that comes with your medication. If you’ve missed a pill and are worried, you can also get in touch with your physician through the chat feature in your account.
Treated trusted source:
Kost,K, Et al. 2008. Estimates of contraceptive failure from the 2002 National Survey of Family Growth. PubMed.gov. U.S.A. N.I.H.
This page was written by The Treated Content Team.
This page was medically reviewed by Dr Alexandra Cristina Cowell on August 25, 2025. Next review due on August 25, 2028.
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
BriellynNorethindrone Acetate/Ethinyl Estradiol
There are some things you need to watch out for when taking Briellyn, and not everyone can use it.
Here’s the official safety info. If there’s something you’re not sure about, let us know.
BriellynNorethindrone Acetate/Ethinyl Estradiol
Briellyn: FAQ
Have something specific you want to know? Search our info below, or ask our experts a question if you can’t find what you’re looking for.
What’s in the inactive Briellyn pills?
Answer:
The inactive pills in your Briellyn pack contain only lactose monohydrate, magnesium stearate, pregelatinized starch and talc.
Briellyn vs Balziva: which is better?
Answer:
Briellyn and Balziva have the same ingredients in the same amounts. In medical terms, they’re bioequivalent. They’ll protect you against pregnancy in the same way, have the same possible side effects and interact with the same medications. Briellyn is made by Glenmark Pharmaceuticals and Balziva is usually made by Teva.
The differences between these two are in their active ingredients, packaging and possibly price. Picking one over the other really depends on you, and your doctor.
What dosage is Briellyn?
Answer:
Briellyn contains 0.4mg of norethindrone acetate (a progestin) and 0.035mg of ethinyl estradiol (an estrogen). You might also see the second number written as 35mcg, or micrograms. The last seven pills are inactive and don’t contain any hormones.
There are other birth control pills which have these same ingredients as Briellyn in the same amounts. They include Balziva, Ovcon 35, Zenchent FE, Philith, Gildagia and Vyfemia.
There are also a lot of birth control pills that contain norethindrone acetate and ethinyl estradiol, but in different amounts. Some well-known names from this list include Loestrin Fe and Microgestin Fe, which are monophasic pills. That means they’ve got the same hormone dose in all their active pills. Ortho-Novum 7/7/7 is a triphasic pill with norethindrone acetate and ethinyl estradiol. It’s got different amounts (phases) of the two hormones throughout the month. Finally, there’s Lo Loestrin Fe, which has the lowest daily dose of estrogen available.
Let a clinician know you’re interested in learning more about the dosage of your birth control pill during your consultation. They can help you find a pill that meets your needs.
What ingredients are in Briellyn?
Answer:
The active ingredients in Briellyn (read: the hormones) are norethindrone acetate and ethinyl estradiol. Norethindrone acetate is a progestin and ethinyl estradiol is an estrogen — that’s what makes Briellyn a “combined” pill.
There are other birth control pills that contain these same ingredients, either in the same amounts or in different ones. Pills that are bioequivalent to Briellyn include Balziva, Ovcon 35, Zenchent FE, Philith, Gildagia and Vyfemia.
There are also birth control pills that contain different proportions of norethindrone acetate and ethinyl estradiol. Some of these have different doses of hormones throughout the month (Ortho-Novum 7/7/7), include an iron supplement in the inactive pills (Microgestin Fe) or contain the lowest daily dose of estrogen available (Lo Loestrin Fe).
Can Briellyn birth control cause weight gain?
Answer:
There haven’t been any studies that link birth control pills (including Briellyn) with weight gain.[1] However, it’s possible that you’ll experience bloating or a change in appetite, which can impact your weight.
These side effects shouldn’t be uncomfortable or interfere with your quality of life. If Briellyn is causing bloating or an appetite change that is severe and not going away as your body gets used to the hormones, talk to your physician. They’ll be able to advise you, which might mean trying a different medication. Not every birth control is perfect for every body, but we’ll help you find one that’s right for you.
Treated trusted source:
Lindh, I, Et al. 2011. The long-term influence of combined oral contraceptives on body weight. Human Reproduction. U.K. Oxford Academic.
Last updated on Aug 25, 2025.
How we reviewed this page:
Our experts continually monitor new findings in health and medicine, and we update our articles when new info becomes available.
Why this page was updated on Aug 25, 2025
'Content checked and updated as part of our 3-yearly periodic review, to ensure accuracy and currentness.'
Current version (Aug 25, 2025)
Edited by: The Treated Content Team.Medically reviewed by: Dr Alexandra Cristina Cowell, Writer & Clinical Content Reviewer
Aug 01, 2022
Published by: The Treated Content Team.Medically reviewed by: Dr Alexandra Cristina Cowell, Writer & Clinical Content Reviewer
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
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Dr Alexandra Cristina Cowell
Writer & Clinical Content Reviewer
Cristina writes content for Treated, and reviews content produced by our other writers to make sure it’s clinically accurate.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
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