Hi,
The absorption of the hormones will not be as good as a patch which was applied higher.Because skin is thinner in the higher area than the top of your leg. Check the Ortho Patch patient information for instructions and call the manufacturer of the Ortho Patch if you can not find an answer in the patient information for instructions. In the mean time you can use a backup method for birth control.
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Regards,
Dr.Yetimyan.