ESWL cannot be used if:
You are pregnant.
You have a bleeding disorder.
You have a kidney infection, urinary tract infection, or kidney cancer.
You have kidneys with abnormal structure or function.
You may need more than one treatment to break up a stone. The larger the stone, the more likely it is that you will need multiple treatments.
You have a cystine kidney stone, which does not break up easily.
You take blood thinners (anticoagulants), and your medication cannot be stopped to perform the procedure.

