Antonyms are words that have opposite meanings. Therefore, antonyms for "Losartan Monopotassium Salt" would be words that are completely different from it. Some possible antonyms for this drug, which is used for treating high blood pressure, include words such as "low blood pressure," "hypotension," "weakness," "fatigue," "sluggishness," "lack of energy," "lethargy," "slow pulse," "bradycardia," and "fainting." Such words suggest the opposite effect of Losartan, which raises blood pressure and keeps it under control. By contrast, these antonyms describe symptoms of low blood pressure and reduced circulation, which can be dangerous if left untreated.