My Son Is 19. He Is Taking Growth Hormone Injection

My son is 19. He is taking growth hormone injection for past three yrs.gh weekly once and testorene monthly once. Endocrinologist gave these inj. But no facial hair so we consulted sexoligst. He tested hormone level .testorene is below 2 he prescribed testorene caps daily 2my dout is
Can he take both inj a and cap
Is this lifelong medicine or curable pls explain dr.