Is there an alternatie to losartan potassium "lifezar" 50mg to control my blood pressure?

Yes: There are many different classes of anti-hypertensives. See your doctor. A combination of medications is the norm to treat hypertension.

Yes: There are alternatives. Why do want to change? Please discuss with your physician.

Alternatives : Losartan is an angiotensin receptor blocker (arb). It does contain potassium. If you do not have serious chronic kidney disease (ckd), the k will not be a problem for you. Other arb's which are effective, have the same effect with no k are valosartan and olmesartan. If you and your physician think k is not good for you, one of those two arb's are excellent choices to switch to. Good luck.