Hi, I'm Taking Losrtan 50 Mg For 9 Months Now

Hi, I'm taking losrtan 50 mg for 9 months now and noticed that my bp is not getting lower as it used to be. It's 130/90 with the med. Before, it would be 117/85. Also, I noticed that I've gain a lot of weight since taking this med and some experiencing some discomfort in my right knee. Any alternative to Losartan? I used to take Lisonopril and Atenelol