A 21-year-old female asked:
Disclaimer

i left my birth control in car over night in 30f degree weather. will the cold 30 degree weather make birth control less effective?

2 doctor answers
Dr. Peter Baumann
Specializes in Obstetrics and Gynecology
Check the pack: It should say on the box/pack, what temperature range should not be exceeded. You can also google the name of your bcp, which will take you to sites that contain detailed descriptions of your pill including the safe temperature range.
Answered on Nov 29, 2015
Dr. Charles Whiting
26 years experience Obstetrics and Gynecology
Still effective...: A night in the car at 30 degrees won't make your birth-controll pills less effective. Most pill makers state that the pill needs to be kept between 68 & 77 degrees. They won't "guarantee" a pill's integrity outside this range. In reality its heat that will denature a pill rather than short exposure to cold such as you described. Best wishes!
Answered on Nov 18, 2019
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Care of med: Yes it will be fine .
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No: not if you din't miss any pills or were only a few hours late in taking one
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Dr. Rosa Testa
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No worries: Birth control pills are not that fragile. They stay the same in hot weather or cold weather and keep working the same way. Pills are made of dry powde ... Read More

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