In general, side effects are mild and transient so the discontinuation of therapy is not required. The frequently reported side effect during Losartan potassium treatment was headache, dizziness.
Others: asthenia/fatigue, edema-swelling, abdominal pain, chest pain, diarrhea, dyspepsia, nausea, insomnia, pharyngitis, swelling of the face, lips, pharynx and/or tongue, angioedema including swelling of the larynx and glottis; causing airway obstruction, cough, fever, orthostatic effects, hypersensitivity, anaphylactic reactions, hepatitis, liver function abnormalities, vomiting, anemia, thrombocytopenia, musculoskeletal pain, arthralgia, palpitation, tachycardia, back pain, cramps, migraine, dysgeusia, urticaria, rash, vasculitis, including Henoch - Schoennlein purpura.
Hyperkalemia may occur, however the condition is usually resolved upon discontinuation of therapy.
Elevations of ALT may occur in patients with hypotension and electrolyte/fluid imbalance, however the condition is usually resolved upon discontinuation of therapy.