(tired, walking slow, feeling out of it, no vitality), extreme fatigue, insulin resistance and even full blown diabetes, poor cholesterol profile, fainting, dizziness, confusion, cold hands and
in men and
arousal disorder in women, and other side effects.
Cutting your cardiac output below what your body wants is not going to be very healthy for it.
(I know, in CHF it can help the failing heart last longer, etc, etc - they do have a use - but they are over-prescribed).