Is Sildenafil safe to take with Isentress, Norvir and Reyataz?

Hi. I’m presently on Isentress, Norvir and Reyataz for HIV and thinking of using sildenafil (A Viagra Alternative) to help with my ED problems. Is it safe to take both HIV meds and Sildenafil at the same time?

Age: 59
Male
Medications: Isentress, Norvir and Reyataz