Losartan
"Used Benicar for 6 weeks to see if I could tolerate it.  Doctor then prescribed Losartan - a generic from the same group of medicines.  Within a week of taking Losartan, I began to experience "fatigue" in my upper body with slight numbness in my arms, hands and fingers. Simple tasks like mowing and trimming my lawn wore me out and caused my upper body muscles to feel like I'd worked out for hours.  Some experience of jaw pain on my left side, ache in neck as well.  I've taken myself off this medicine for the weekend and will see if my Doctor can put me back on Atenolol/ Chlorothal, my previous blood pressure medicines (made me sensitive to sunlight but nothing as bad as Losartan)
Doctor seemed surprised by my side effects but reading this site among others shows I'm not alone."