Yes intermittent fasting can reduce your blood pressure slightly just like when you don't eat any food for awhile even when you're not intermittent fasting the blood pressure can be reduced.
Whenever I do intermittent fasting my blood pressure drops some which is normal and then when I eat again my blood pressure eventually rises again.
Intermittent fasting can cause a drop in blood pressure because intermittent fasting can reduce your insulin and improve weight loss, both of which improves your blood pressure and blood flow.
Eating food can make your blood pressure go up slightly especially if you eat foods that are high in sodium.
The higher sodium intake from high in sodium foods can cause a temporary spike in blood pressure but then a few hours or so later your blood pressure should return to normal.
However most times when you eat food the blood pressure actually drops a little bit because the body directs blood to the stomach and small intestine.
That causes a slight drop in your blood pressure until your food is digested and then your blood pressure should go back up.
Not eating can cause a drop in blood pressure as well so make sure you're eating properly and eating enough.
Most peoples blood pressure does normally drop slightly after a meal but then once the food is digested or within an hour or so of eating the meal your blood pressure should rise again.