* dizziness
* weakness
* lightheadedness
* feeling faint when standing.
The risk can be greater in people who are dehydrated or taking certain other blood-pressure medicines.
If these symptoms are persistent or severe, speak with your healthcare provider.
## 3. Tiredness or Weakness
Some people report tiredness or weakness while taking losartan. The NHS lists tiredness among the common side effects of the medicine.
Fatigue has many possible causes, so it does not automatically mean losartan is responsible.
If unexplained tiredness begins after starting treatment or becomes severe enough to affect daily activities, discuss it with your doctor.
## 4. Headache
