What can explain the increased sweating in experiencing all over my body. i am on zyprexa and invega sustenna. have heat rash. maybe med withdrawal?

Too much too much: More likely serotonin excess/ syndrome due to the two medications that as a part of their effect block seorotonin reuptake. Discuss this with your provider. A change in medications or adjustment in doses would likely help. More important have they been effective for the symptoms they were prescribed for. Have you abruptly discontinued either or other meds? Do you not infrequently forget them