blood pressure: highest and lowest

It is said that the human being's blood pressure chhanges in a circle of 24 hours. My questions are following:

1. When is the highest and when is the lowest?

2. What is the range for most people? Or is the range a constant for everybody? Is there a optimal range?

3. Is the range supposed to be same for people with high blood pressure, too?

My doctor once muttered "Hormones" when I put the question to him. So my next question is which hormone and what can be done to restrain it?

There are multiple factors. The best way to understand it is to study the equation:

BP=CO*SVR

Where BP is Blood Pressure, CO is Cardiac Output, and SVR is Systemic Vascular
Resistance.

CO= SV*HR

Where SV is Stroke Volume and HR is Heart Rate.

The expanded equation is therefore BP=SV*HR*SVR.

Because all three variables that define BP are functions of time:

The further expanded equation is:

BP(t)=SV(t)*HR(t)*SVR(t).

Moreover, SV(t) is affected by heart rate, contractility (affected by hormones), and blood pressure itself.

You should now sense that there is many levels of regulation involved in the control of blood pressure as a function of time. When blood pressure stays abnormally elevated at rest, this indicates a problem with regulation of blood pressure. Such problems from a systems perspective will typically alter the behavior of the system (exaggerated swings in pressure) along with the setpoint.

It can blunt the morning rise in blood pressure.

Servant to the humblest person in the universe,

Cortisol and adrenaline are the two main ones as far as blood pressure is concerned.

Stress reduction would lower levels of both.

Servant to the humblest person in the universe,

I can never understand why when I am supposedly at my most relaxed (asleep)
that my BP is rising to it's daily peak. Can you explain why "It is often exaggerated in folks with high blood pressure" Would taking medications at night instead of morning normally help?