How to switch from Desorex (desogestrel) to Cerazette (desogestrel)?

Switching from Desorex to Cerazette

Since both Desorex and Cerazette contain the same active ingredient (desogestrel 75 mcg), you can switch directly from one to the other without any gap or need for backup contraception—simply start Cerazette the day after finishing your last Desorex pill. 1

Direct Switch Protocol

• Take the first Cerazette pill the day immediately following your last Desorex pill, maintaining continuous daily dosing without interruption 1
• No backup contraception is required because both medications contain identical active hormone (desogestrel 75 mcg) and you are maintaining continuous progestin coverage 1
• Continue taking Cerazette at the same time each day (within 24 hours) to maintain contraceptive effectiveness, as progestin-only pills require strict timing 2

Key Considerations During the Switch

• Contraceptive protection remains uninterrupted throughout the switch because the same progestin at the same dose maintains ovulation suppression 3, 4
• No pregnancy testing is needed before switching, as you are transitioning between identical formulations while actively using contraception 1
• Bleeding patterns should remain similar since the hormonal exposure is unchanged, though individual variation may occur 5, 3

Important Timing Reminders

• Progestin-only pills have a narrow window for effectiveness—pills taken more than 3 hours late may compromise contraceptive protection and require backup contraception for 2 days 1
• If you miss a pill during or after the switch, take it as soon as remembered and use backup contraception (condoms) or abstain from intercourse for the next 2 days 1

Common Pitfalls to Avoid

• Do not create any gap between finishing Desorex and starting Cerazette—even a single day without pills requires 2 days of backup contraception 1
• Do not wait for your next menstrual period to make the switch—continuous daily dosing is essential for progestin-only contraception 1
• Do not assume you need backup contraception for this switch—this is only necessary when switching between different contraceptive methods or hormone types, not identical formulations 1