Natazia 28 Day Is a Four-Phasic Birth Control Pill That Uses Natural Estrogen to Prevent Pregnancy and Treat Heavy Periods

If your doctor has mentioned Natazia 28 Day or you've seen it on your pharmacy shelf, you probably have questions. What is it exactly? How is it different from other birth control pills? Is it right for you?

This guide breaks down everything you need to know about Natazia in plain language — what it is, what it's used for, how to take it, who should avoid it, and how much it costs in 2026.

What Is Natazia 28 Day?

Natazia is a prescription combined oral contraceptive (birth control pill) made by Bayer Healthcare Pharmaceuticals. Its active ingredients are:

• Estradiol Valerate — a synthetic prodrug that converts into 17β-estradiol, the same estrogen your body naturally produces
• Dienogest — a progestin hormone

What makes Natazia stand out from most other birth control pills is that it uses natural estrogen (Estradiol Valerate) instead of the synthetic ethinyl estradiol found in the vast majority of oral contraceptives. It's also four-phasic, meaning the hormone levels change across four phases during the 28-day cycle, mimicking a more natural hormonal pattern.

Key Facts at a Glance

• Brand name: Natazia
• Generic name: Estradiol Valerate and Estradiol Valerate/Dienogest
• Drug class: Combined oral contraceptive (four-phasic estrogen/progestin)
• Manufacturer: Bayer Healthcare Pharmaceuticals
• FDA-approved: Yes
• Controlled substance: No
• Generic available: An authorized generic by Sandoz is FDA-approved but not yet commercially available as of early 2026

What Is Natazia Used For?

Natazia is FDA-approved for two uses:

1. Preventing Pregnancy

Like other combined oral contraceptives, Natazia prevents pregnancy by suppressing ovulation, thickening cervical mucus, and altering the uterine lining. When taken correctly, it's highly effective.

2. Treating Heavy Menstrual Bleeding (Menorrhagia)

Natazia is one of the few birth control pills specifically FDA-approved to treat heavy menstrual bleeding that is not caused by a condition of the uterus (like fibroids). If you've been dealing with extremely heavy periods, your doctor may prescribe Natazia to reduce blood loss and make your cycles more manageable.

Off-Label Uses

Some doctors also prescribe Natazia off-label for:

• Managing endometriosis-related pain
• Regulating irregular menstrual cycles
• Managing symptoms of premenstrual dysphoric disorder (PMDD)

How Is Natazia Taken?

Natazia comes as a 28-day blister pack with color-coded tablets. You take one tablet every day at the same time, following the arrows on the pack:

1. Days 1-2 (dark yellow): 3 mg Estradiol Valerate only
2. Days 3-7 (medium red): 2 mg Estradiol Valerate + 2 mg Dienogest
3. Days 8-24 (dark yellow): 2 mg Estradiol Valerate + 3 mg Dienogest
4. Days 25-26 (light yellow): 1 mg Estradiol Valerate only
5. Days 27-28 (white): Placebo (inactive) tablets

Start a new pack immediately after finishing the current one — no break between packs. If you miss a pill, follow the specific missed-dose instructions in the patient information that comes with your prescription. Missing pills can reduce effectiveness and increase the chance of breakthrough bleeding.

Who Should Not Take Natazia?

Natazia is not safe for everyone. You should not take Natazia if you:

• Smoke and are over 35 — This is Natazia's boxed warning (the FDA's most serious warning). Smoking combined with oral contraceptive use dramatically increases the risk of blood clots, stroke, and heart attack, especially over age 35.
• Have a history of or current blood clots (DVT or pulmonary embolism)
• Have a history of stroke or heart attack
• Have known or suspected breast cancer or other hormone-sensitive cancers
• Have liver tumors or active liver disease
• Have undiagnosed abnormal uterine bleeding
• Are pregnant
• Have uncontrolled high blood pressure
• Have diabetes with vascular complications
• Get migraines with aura
• Have valvular heart disease with complications

For a full rundown on potential risks, read our guide on Natazia side effects.

How Much Does Natazia Cost?

Here's the cost picture for Natazia in 2026:

Without Insurance

The cash price for Natazia ranges from $238 to $845 per 28-day pack, depending on the pharmacy. That's significantly more expensive than generic birth control pills, which often cost $10-$50 per month.

With Insurance

The good news: most insurance plans cover Natazia under the ACA contraceptive mandate with no cost-sharing, meaning you may pay $0 out-of-pocket. About 88% of insurance plans cover Natazia, with typical co-pays of $37.50 to $67.50 for those that do charge a co-pay. Some plans may require prior authorization or step therapy (trying a generic first).

Savings Programs

If cost is a barrier, several options can help:

• Bayer Savings Card: Pay as little as $0 for insured patients (up to $125 savings per fill) or save up to $75 per fill for cash-pay patients. Enroll at BayerSavingsCard.com.
• Bayer Patient Assistance Foundation: May provide Natazia at no cost for qualifying uninsured or underinsured patients.
• Discount cards: GoodRx, SingleCare, and other discount programs may offer reduced pricing.

For a complete breakdown, read our guide on how to save money on Natazia 28 Day.

What Makes Natazia Different from Other Birth Control Pills?

Natazia stands apart in several ways:

• Natural estrogen: Uses Estradiol Valerate instead of synthetic ethinyl estradiol. This may result in fewer estrogen-related side effects for some women.
• Four-phasic dosing: The hormone levels change across four phases during the cycle, rather than staying the same (monophasic) or changing just once or twice. This more closely mimics your body's natural hormone fluctuations.
• FDA-approved for heavy periods: Most birth control pills are only approved for contraception. Natazia is one of the few also approved to treat heavy menstrual bleeding.
• Contains Dienogest: This progestin is different from the norethindrone, levonorgestrel, or drospirenone found in most other pills. Dienogest has particular benefits for conditions like endometriosis.

For a more detailed explanation of how Natazia works in your body, check out our guide on how Natazia works.

Final Thoughts

Natazia 28 Day is a unique birth control pill that uses natural estrogen and four-phasic dosing to prevent pregnancy and treat heavy menstrual bleeding. It's a good option for women who want an oral contraceptive that more closely mimics their body's natural hormonal pattern, or who need treatment for heavy periods along with birth control.

The main downsides are its higher cost (without insurance) and limited pharmacy availability as a brand-name-only product. But with insurance coverage, savings programs, and tools like Medfinder to locate it in stock, most patients can access Natazia without too much hassle.

Talk to your doctor about whether Natazia is right for you, and use our guide on finding a prescribing doctor if you need help getting started.