Nextstellis vs Yaz: differences for PMS and PMDD

Yaz and Nextstellis are both combined hormonal birth control pills built around the same progestin, drospirenone. They differ in which estrogen they pair it with, and in how much premenstrual research backs them.

Yaz combines drospirenone with ethinylestradiol, taken as 24 active pills followed by 4 placebo pills [2, 4]. Shortening the hormone-free interval to 4 days, instead of the usual 7, smooths out the hormone swings that can come before a period [2].

Nextstellis pairs drospirenone with estetrol, a newer type of estrogen. It was developed and approved as a contraceptive, not studied as a treatment for premenstrual mood or physical symptoms.

The two pills differ in three ways:

• Progestin: both use drospirenone, so this part is shared.
• Estrogen: Yaz uses ethinylestradiol; Nextstellis uses estetrol, a newer estrogen.
• Research record: Yaz has published trials for PMDD; Nextstellis has none.

Drospirenone itself has antimineralocorticoid and antiandrogenic effects that older progestins don't share, which is part of why it's linked to improvements in bloating, acne, and mood symptoms [4]. The real difference for PMS or PMDD is the research record behind each pill, since both contain the same progestin.

For the full rundown on Yaz's ingredients and regimen, see Yaz: what it is and whether it helps PMS.

Yaz has direct evidence for premenstrual dysphoric disorder. Two clinical trials examined the drospirenone/ethinylestradiol 24/4 regimen and found it eased the mood, physical, and behavioral symptoms of PMDD, along with symptoms tied to food cravings, water retention, and friction in relationships [3]. The FDA has approved this specific regimen for PMDD, one of only four treatments with that approval [3].

Nextstellis hasn't been studied this way. There's no published trial testing it against PMS or PMDD symptoms specifically, so any benefit for premenstrual mood or physical symptoms is carried over from its drospirenone content, not a tested finding.

That gap matters if PMDD is the main reason you're considering a pill. For more on that specific evidence, see Yaz for PMDD: does it work? and birth control for PMDD.

Quality of life research backs up why this distinction is worth asking about. Women with PMS and PMDD both report worse quality of life than women with no premenstrual symptoms, especially around emotional role limitations, and PMDD carries the heavier overall burden [1]. Trial evidence is a reasonable factor to weigh when choosing between the two, rather than assuming one that shares an ingredient will do the same job.

Because Yaz and Nextstellis share drospirenone, some side effects overlap. The estrogen each pill uses differs, which is where their profiles can diverge.

Side effect	Yaz	Nextstellis
Breast tenderness, nausea, headache	Reported, consistent with other drospirenone pills [4]	Expected with combined pills generally, not studied in premenstrual trials
Mood changes	Studied directly in PMDD trials, with improvements reported [3]	Not studied for mood specifically
Blood clot or high-potassium risk	Not shown to be higher than other progestins in large safety studies [4]	Uses a different estrogen; comparative data isn't part of the research reviewed here
Fluid retention, bloating	Drospirenone's antimineralocorticoid effect is linked to less bloating than older progestins [4]	Shares the same progestin, so a similar effect is plausible but untested for this use

Any combined pill carries some increased risk of blood clots compared with no hormonal contraception, and your doctor weighs that against your personal and family history before prescribing either one. For a closer look at Yaz specifically, see Yaz side effects, including mood.

Switching from Yaz to Nextstellis, or the other way, is something your doctor manages, not something to start on your own.

A doctor typically walks through this order:

1. Finish your current pack as scheduled, including the placebo days, unless told otherwise.
2. Start the new pill the day after your last placebo pill, with no gap in between.
3. Track your cycle and any premenstrual symptoms daily for at least one full cycle after switching.
4. Report any new or worsening mood symptoms early, rather than waiting out several cycles.

Because Nextstellis hasn't been tested for PMS or PMDD, switching to it from a treatment with trial support, like Yaz, means watching your symptoms closely rather than assuming the same result.

If you want somewhere to log what's happening day to day while you wait to see how a new pill affects you, Niyora is a PMS and PMDD support app. Its Moon feature lets you write down what happened when things feel overwhelming, see it from another angle, and calm down before you decide what to say or do next.

Bring your own pattern, not just the names of these two pills. A doctor can only match treatment to what's actually happening across your cycle.

Questions worth bringing to that appointment:

• Does my symptom pattern fit PMS, PMDD, or an existing condition that worsens before my period?
• Is there a reason to choose a treatment with trial evidence for PMDD, like Yaz, over one without it, like Nextstellis?
• How long should I expect to wait before judging whether a pill is working?
• What would switching look like if this one doesn't help?

If your symptoms take up a week of every month, or you've had thoughts of hurting yourself, see a GP or gynecologist and bring two months of daily notes on your mood and physical symptoms. For the basics on what helps PMS generally, see PMS treatment: what actually helps and what is PMS, premenstrual syndrome, explained.