TRI-NORINYL 21-DAY vs TRI-NORINYL 28-DAY

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated June 7, 2026·How we rate

Attribute	TRI-NORINYL 21-DAY	TRI-NORINYL 28-DAY
Rating	New	New
Pharmacy pays	—	—
Type	RX	RX
Active ingredient	ETHINYL ESTRADIOL AND NORETHINDRONE	ETHINYL ESTRADIOL AND NORETHINDRONE
Manufacturer	Dr Reddys Labs Sa	Dr Reddys Labs Sa
Dosage forms	Tablet	Tablet
Drug class	—	—
Boxed warning	None	None
Half-life	about 8 hours	about 8 hours

tri-norinyl 21-day tri-norinyl 28-day

Rating

New

Pharmacy pays

—

Type

Active ingredient

ETHINYL ESTRADIOL AND NORETHINDRONE

Manufacturer

Dr Reddys Labs Sa

Dosage forms

Tablet

Drug class

—

Boxed warning

None

Half-life

about 8 hours

Frequently asked questions

What is the difference between Tri-Norinyl 21-Day and Tri-Norinyl 28-Day?

Both Tri-Norinyl 21-Day and Tri-Norinyl 28-Day share the active ingredient Ethinyl Estradiol and Norethindrone.

Ratings are based on FDA regulatory (recall-safety) data. This comparison is for general reference only — not medical advice. Always consult a licensed professional before choosing or switching a medication.