How long does it take for Bydureon Bcise to take effect?
Bydureon Bcise starts working as soon as you inject the first dose but it may take two or more weeks before it has a noticeable effect on your blood sugar, and longer before it decreases your HbA1c levels. Bydureon Bcise builds up gradually in your body with each weekly dose and reaches its optimal level after 10 weeks of dosing. The extended-release delivery system keeps a consistent level of medicine in your body.
References
- Bydureon BCise (exenatide). Updated 12/2022. AstraZeneca Pharmaceuticals LP. https://www.drugs.com/pro/bydureon-bcise.html
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The most effective GLP-1 drug for weight loss currently (as of mid-2025) is tirzepatide, marketed under the names Zepbound (for weight loss) and Mounjaro (for diabetes).
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How long can Bydureon be unrefrigerated?
Bydureon can be left unrefrigerated at room temperature for up to 4 weeks (28 days) as long as the temperature in the room does not exceed 86°F (30°C). This will allow you to take your weekly dose with you, especially if you are traveling. Never leave your Bydureon pen in the sun or a hot place, like your car's jockey box, because it will become too hot. And do not put it back in the refrigerator if it has been out of the refrigerator for longer than an hour. Continue reading
How do you use the Bydureon pen?
The Bydureon pen was discontinued in March 2021 and has been replaced by Bydureon Bcise Autoinjector. The Bydureon Bcise Autoinjector has been designed to be easy to use. There is no need to attach a needle (the hidden needle is already attached) or turn a dial. Always store your Bydureon Bcise autoinjector flat in the refrigerator. It can be self-injected at home once a week and it is easy to learn how to administer it yourself. If you have difficulty injecting it, a family member, friend, caregiver, or healthcare provider may be able to do it for you. Instructions for injecting the Bydureon Bcise autoinjector are given below. Continue reading
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Drug information
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