Headache can occur while taking losartan and is listed among common side effects by the NHS.
An occasional mild headache may not be serious. However, a sudden, unusually severe, or persistent headache should not simply be assumed to be a medication side effect.
Seek medical advice if the headache is severe or accompanied by other concerning symptoms.
## 5. Stomach Pain, Nausea, or Vomiting
Losartan can sometimes cause gastrointestinal symptoms such as stomach pain, nausea, or vomiting.
Mild stomach upset may improve as your body adjusts to treatment.
However, severe or persistent abdominal symptoms deserve medical assessment, particularly when accompanied by swelling, difficulty breathing, dehydration, or significant weakness.
## 6. Swelling of the Legs, Ankles, or Feet
