My Husband Is 29 Years Old And I Am 26...he

my husband is 29 years old and i am 26...he feels very tired for sex. he is having high bloodpressure problem. sence last 6 months we had not even sex. he is afread to do sex.as he is feeling very stressfull as well as week. he is feeling very sleepy for whole day . what treatment he shoul take..so that he will get well soon without any side effect.