Irbesartan is an angiotensin II receptor antagonist, which has the side effect of causing sexual dysfunction, but do not have too much psychological pressure because it is relatively safe. There may be some mild side effects such as dizziness, headache, palpitations and cough. There may also be less probable adverse reactions such as indigestion, diarrhea, bone pain, respiratory tract infection, and fatigue. If there are side effects, you can switch to a similar drug, valsartan, which is an angiotensin II receptor antagonist. Instead of reducing erection, libido and ejaculation in sexual function, valsartan has improved them all.