My husband is 63 & takes medication for high blood pressure. He consistently has readings of 120/75 but occasionally BP is slightly higher or lower. He is very active, has a normal BMI and eats primarily a vegetarian diet. When BP was taken (at dermatologist) they recognized his pulse was very low- between 45 and 50! He has no energy (this is a significant change for him). He is not very interested in eating and has had an upset stomach. Any suggestions?