I use versatis medicated pain relief patches. what are the side effects of these and is it ok to use two at a time?

OK for Max of Three: If you are average size, you can use up to 3 applied to unbroken skin at a time.You should not use for over 24 hours without a 12 hours period with them removed. If you stay within those requirements you should not experience any sedation, seizures or other systemic effects which can occur with an overdose or if the area with the patches are exposed to extreme heat. For more info see lidocaine.