Switching Birth Control: From Loette to Yaz and Its Effects

The issue of switching from Loxonin to Yaozi regarding medication?

Hello, I started taking Loryn on December 12, 2022, but I have found that the side effects have significantly affected me over the past few months.
I initially sought treatment for menstrual regulation, and since taking this medication, my periods have been regular.
I switched to Yaz on May 27, 2023.
Before changing medications, I consulted with my gynecologist, who advised me to transition directly.
My last menstrual period was from May 25 to May 30, and the previous one was from April 27 to May 2.
Since March, I have not had unprotected sexual intercourse, but I had three instances of ejaculation inside in May.
I would like to know if I will have contraceptive protection now that I have just switched medications, especially if I engage in unprotected and internal ejaculation sexual intercourse.

Pei, 10~19 year old female. Ask Date: 2023/06/01

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, it also has contraceptive effects.
Wishing you good health.

Reply Date: 2023/06/01

More Info

When switching from one birth control pill to another, such as from Loette to Yaz, there are several factors to consider regarding the effectiveness of the new contraceptive, potential side effects, and the timing of your menstrual cycle.

First, it's important to understand that both Loette and Yaz are hormonal contraceptives, but they contain different formulations of hormones. Loette typically contains a combination of ethinyl estradiol and levonorgestrel, while Yaz contains ethinyl estradiol and drospirenone. The switch between these two pills can sometimes lead to changes in your menstrual cycle and may also affect your body’s response to the new hormones.

Since you mentioned that you started taking Yaz on May 27, right after finishing your period on May 30, you are likely to have immediate contraceptive protection if you started taking Yaz within the first five days of your menstrual cycle. However, since you had unprotected intercourse before switching pills, there is a possibility of pregnancy if the previous contraceptive was not effective or if there was a lapse in protection.

Regarding the effectiveness of Yaz after switching from Loette, if you followed your healthcare provider's advice to switch directly without a break, you should have maintained contraceptive coverage. However, if there was any delay in starting Yaz or if you missed any doses, the effectiveness could be compromised. Generally, it is recommended to use a backup method of contraception, such as condoms, for the first seven days after switching pills to ensure full contraceptive protection.

As for side effects, switching birth control pills can sometimes lead to irregular bleeding, mood changes, or other hormonal side effects as your body adjusts to the new formulation. It’s not uncommon to experience some irregularities in your menstrual cycle when transitioning between different hormonal contraceptives. If you notice significant changes or if side effects become bothersome, it is advisable to consult your healthcare provider for further evaluation and management.

In summary, if you have switched from Loette to Yaz and started taking Yaz correctly, you should have contraceptive protection. However, due to the history of unprotected intercourse, it is wise to take a pregnancy test if you experience any unusual symptoms or if your next period is late. Always consult with your healthcare provider for personalized advice and to address any concerns regarding your birth control method and its effects on your health.

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