Recently Dx With Asthma At Age 62 After Suffering With

Recently dx with asthma at age 62 after suffering with allergies for 60 yr. I was prescribed 2 inhalers one for everyday an 1 recuse, I also was given montelukast (singular). I am now experiencing muscle cramps in front thighs and abdominal cramps in my hands. Do you think this might be a side effect of recents meds. Also additionally. I have been doing more walking after a VERY sedative life style, I weight 300 and 5'9.