Tri-EstaryllaTri Norgestimate and Ethinyl Estradiol
What is Tri-Estarylla?
Tri-Estarylla is a combined birth control pill that’s over 99% effective if taken correctly. It’s a triphasic pill, meaning the hormone levels change through the 28-day cycle.
How does Tri-Estarylla work?
Tri-Estarylla works in multiple ways to stop pregnancy. One way is by stopping the release of an egg, so it can’t get fertilized. Another way is by thickening the cervical lining, making it hard for the sperm to cross. Lastly, it thins the uterine lining, so if by chance an egg is released, it’s unable to implant.Â
Will I get side effects on Tri-Estarylla?
You might get side effects while on Tri-Estarylla. Some of the common side effects include:
HeadacheÂ
Breast tenderness
Breast changes
Stomach discomfort
Vaginal infections
Mood changes
Weight fluctuations
Is Tri-Estarylla a low-dose birth control?
There are two versions of Tri-Estarylla: a standard dose and a low-dose version known as Tri-Lo-Estarylla. The low-dose option is recommended for individuals who get side effects from the higher dose.
What doses of Tri-Estarylla are there?
Tri-Estarylla is a triphasic birth control pill, so the hormone levels fluctuate throughout the month.Â
The levels of norgestimate change, while the levels of ethinyl estradiol remain the same. There are three different types of pills in this pack:
Light blue pill, which contains 0.18 mg of norgestimate and 0.035 mg of ethinyl estradiol.
Medium blue, which contains 0.215 mg of norgestimate and 0.035 mg of ethinyl estradiol.
Dark blue, which contains 0.25 mg of norgestimate and 0.035 mg of ethinyl estradiol.
This page was written by The Treated Content Team.
This page was medically reviewed by Dr Alexandra Cristina Cowell on August 26, 2025. Next review due on August 26, 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.
Tri-EstaryllaTri Norgestimate and Ethinyl Estradiol
How to take Tri-Estarylla
Tri-Estarylla contains 28 pills: 21 active pills in different shades of blue, and seven inactive green pills.Â
In week one, you’ll take light blue pills, followed by medium blue in week 2, then dark blue in week 3, and lastly, green pills in week four.Â
You’ll take one pill daily at the same time each day for maximum effectiveness.Â
For information on how to start Tri-Estarylla, check the package leaflet.Â
How long does Tri-Estarylla take to work?
If you start taking the pill on the first day of your period or immediately after switching from another birth control pill, you should have protection from the start.Â
If you start taking the pill at any other time, you’ll need to use an additional form of contraception for the next seven days.
I missed a pill on Tri-Estarylla, now what?
If you use a green pill, don’t worry. These are inactive pills and don’t affect your protection.Â
If you miss any of the blue pills, your protection may be less effective. In this case, you’ll need to use another form of contraception for the next seven days to rebuild your pregnancy protection.
This page was written by The Treated Content Team.
This page was medically reviewed by Dr Alexandra Cristina Cowell on August 26, 2025. Next review due on August 26, 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.
Tri-EstaryllaTri Norgestimate and Ethinyl Estradiol
Tri-Estarylla isn’t suitable for everyone, and there are some things that you need to be aware of when taking it.
Here’s all the official info on it. If anything is unclear, let our doctor know, and they can talk with you about it.
Tri-EstaryllaTri Norgestimate and Ethinyl Estradiol
Tri-Estarylla: 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.
How does Tri-Estarylla compare with Tri-Sprintec?
Answer:
Tri-Estarylla and Tri-Sprintec are two combined birth control pills. Both pills contain the same active ingredients, in the same three concentrations, so they work in the same way.Â
The main differences are non-clinical, such as the manufacturers, packaging, and price.
Does Tri-Estarylla cause weight gain?
Answer:
Some people have reported weight changes while using Tri-Estarylla.
Although it’s uncommon to gain weight on birth control pills, some people may experience slight weight gain during the first few months of use. This is usually due to water retention and typically resolves within a few weeks.[1]
Is there a generic version of Tri-Estarylla?
Answer:
No, there isn't a generic version of Tri-Estarylla. There are other brands like Tri-sprintec, which contain the same hormone in the same amounts, but at a lower price.
Can I get Tri-Estarylla through private health insurance?
Answer:
Most private healthcare plans cover birth control pills, but there may be some that only cover specific brands. So if you’re looking to get Tri-Estarylla and have private health insurance, you should check your plan to make sure it’s covered.
If it isn’t covered, your insurance may cover a similar version. Otherwise, you can always get Tri-Estarylla from an online prescription and pharmacy service.
Treated trusted source:
Mayeda, E. R., et al. (2014).Weight and Body Composition Changes During Oral Contraceptive Use in Obese and Normal Weight Women. Journal of Women’s Health, 23(1), 38.
Last updated on Aug 26, 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 26, 2025
We reviewed the content on this page and made some structural changes to make it more reader-friendly and accessible.
Current version (Aug 26, 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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