Losartan Weight Gain Side Effect? Can you gain weight from using the anti-hypertension drug Losartan? Yes you can! It is not one of the more common side effects of the drug but it does happen. In fact, weight gain is listed by the Mayo Clinic as one of the less common side effects of Losartan. Interestingly, it is also worth noting that weight loss is listed as one of the rare side effects.
In either instance, whether you gained or lost weight following Losartan use, it is important that you should tell your doctor about it.