I Have Been Prescribed Lisinopril 10 Mg. My Question Is

I have been prescribed lisinopril 10 mg. My question is a concern about my blood pressure is normal and I am worried about my blood pressure going to low. I have been prescribed this for a low circulation problem in my right leg. I am not a drinker, smoker, and underweight. I am a male 71 years old. I weigh 170 lbs and and 5'9". Very active. I take sertraline 50mg tablet everyday, and I take pravastatin 40 Mg tab every day. also a 81 mg aspirin everyday.