There are a number of side effects with losartan that you should report immediately to your healthcare provider. These include, but are not limited to:
Unexplained skin rash
Itching
Unexplained blisters or peeling of the skin
Unexplained swelling of the head or neck (including the face, lips, tongue, or throat)
Wheezing
Difficulty breathing or swallowing
Dizziness, light-headedness, or fainting spells
Decreases in the amount of urine produced.
Rare Side Effects of Losartan
There are other possible losartan side effects that can occur. These rare side effects occur in less than 1 percent of people. Given how rare they are, it can be difficult to tell whether these side effects are caused by the medication or something else.
Some of these rare but possible side effects of losartan include, but are not limited to: