10 yr old with high prolactin level due to medication

MY 10 yr old son has ADHD/ANXIETY/PHOBIA/ AND ALSO A MOOD DISORDER which he is still being evaluated at school perhaps it might be BI-POLAR. He is currently being given RISPERIDONE 1.0  3X  /mgCONCERTA 36MG 1X / RITILIN 10MG 2X /AND SEROQUEL 50Mg AT NIGHT. He gets his blood and ekg done regularly. my concern is this last time his blood results came back with a level 60 of prolactin i have been very worried and concerned as to how this may affect him however his psychiatrist reassured me that it's ok his prolactin is high due to his RISPERIDONE intake and that within a year it will go back to normal i don't see how this is possible but he said not to worry. My question researching about high prolactin levels i see that it can affect his liver kidneys and  more things can develop. can anyone tell me if i should not be worried or if someone has had this problem before or should i just get him tested again and if it has gone higher  ignore his psychiatrist advice of not worrying and worry and take him elsewhere . Thank you for reading this and offering your advice i really appreciate it from a very very concerned mom .