Thanks for providing more information.
Firstly as you have history of prolonged hours of standing and sitting so it can be a contributing factor in swelling.
So i recommend you to take short breaks of rest while doing work and do some stretching exercises.
Secondly,your blood pressure is fine,localized edema(swelling) is uncommon side effect of Losartan Potassium so your medication dosage can be adjusted by your doctor.
Apart from this,sudden fluid retention(swelling on ankles and feet) can be caused due to venous insufficiency,lymphatic obstruction,liver/kidney/heart pathology.
So further blood work including CBC,ESR,Liver function test,Renal function test,EKG should be advised by your doctor.
Elevate and exercises your legs.
And consult your doctor as per your appointment.
If you feel shortness of breath,redness in lower limbs,fast or irregular heartbeat,excessive swelling then visit ER.
Hope this helps.
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