By Irfana
B.Sc (Psychiatry Ward)
14 June 2022 -
Medically reviewed by
D. Pharm
Does Lorazepam Lower Blood Pressure?
Table of Contents

Blood pressure is an extremely common term, it is used frequently. So, what exactly is blood pressure? Before diving into this, let us first understand the functioning of blood in our bodies.

Our body contains more than one gallon of blood! That’s a lot and it is so for a reason. The blood in our body is primarily responsible for supplying nutrients and oxygen to various body parts.

At the same time, our blood is also responsible for the removal of waste from the body. However, blood does not flow on its own. It is pumped by the heart. This is where blood pressure comes into the picture.

What Is Blood Pressure?

Blood flows through your body through the arteries. Blood pressure is nothing but the pressure that the heart has to put on to ensure a smooth flow of blood through these arteries ensuring blood reaches all your body parts.

This pressure must be within required limits. Blood pressure is not measured on one parameter, rather it is measured on two parameters. Also known as Systolic reading and Diastolic reading. (Tholl, U., Forstner, K. and Anlauf, M., 2004)

How Is Blood Pressure Measured?

An instrument that measures blood pressure is called a sphygmomanometer. Nowadays a lot of modern electronic BP machines are also available in the market.

The unit of measure is mm HG which represents millimeters of mercury. The two blood pressure readings are:

  • Systolic
  • Diastolic

It is quite convenient to use electronic bp devices to measure BP at home if you have any doubts. It may not be as accurate as a sphygmomanometer but it still helps you get an idea.


The Systolic reading captures the pressure your heart has to exert when it is beating. The Systolic reading is seen on the top of a BP machine. When the heart contracts it measures the force of blood that is required to pump the blood through your body.


On the other hand, the Diastolic reading captures the pressure your heart has to exert when it is relaxed. Diastolic reading is seen at the bottom of the bp machine. It measures the relaxation of the heart between the heartbeats.

Naturally, the pressure when the heart is beating is higher than when it is relaxed. So invariably the Systolic reading is on the higher side like around 120 and the Diastolic reading is on the lower side like around 80.

Oftentimes, it is assumed that high blood pressure refers to the top reading and low blood pressure is the bottom reading. That is however not the case. (Tholl, U., Forstner, K. and Anlauf, M., 2004)

What Is High Blood Pressure?

High blood pressure takes place when your heart has to exert more than the required pressure to get the blood flowing through your body. Here is a look at how high blood pressure is classified:





80 to 119

60 to 79


120 to 139

80 to 89

Stage 1

140 to 159

90 to 99

Stage 2

160 to 179

100 to 109


More than 180

More than 109

It is important to keep in mind that even if one of the two readings is off then you must seek medical attention. (Stamler, J., 1991)

What Is Low Blood Pressure?

Just like high blood pressure, low blood pressure takes place when your Systolic blood pressure is less than 80 or your Diastolic blood pressure is less than 60.

Overall low blood pressure is uncommon but it can prove to be fatal. You must check your blood pressure regularly. (Wessely, S., Nickson, J. and Cox, B., 1990)

What Is Lorazepam?

Lorazepam belongs to benzodiazepine drugs. It is sold under the brand name Ativan. It has sedating properties. It is a prescription-only drug you can get this medication online so be aware before buying Lorazepam online.

It is mainly used to treat anxiety, insomnia, stress, seizures, and alcohol withdrawal. It is well known that all of this is connected to blood pressure. (Rutgers, J.G. and Shearer, C.M., 1981)

Lorazepam And Blood Pressure

Lorazepam calms you down and slows down your central nervous system, brain, and body functions. Your physiological functions like breathing, heart rate, blood pressure, etc.

Lorazepam slows down the heart rate. It decreases the blood flow in the arteries and it leads to lower blood pressure. 

You need to tell your doctor of any blood pressure medicines you may be consuming or if you are suffering from any blood pressure problems. 

Low blood pressure is considered to be a common side effect of Lorazepam. The good news is that in most cases the changes in blood pressure have been marginal.

Nevertheless, if you or your loved one are on Lorazepam you need to keep an eye on symptoms related to low blood pressure. (Riva-Posse, P., Reiff, C.M., Edwards, J.A., Job, G.P., Galendez, G.C., Garlow, S.J., Saah, T.C., Dunlop, B.W. and McDonald, W.M., 2018)

Symptoms Of Low Blood Pressure

Overall when blood pressure is on the lower side it is considered to be good. However, it should still be within limits. Here are some dominant symptoms of low blood pressure that need to be checked:

  • Fatigue
  • Disorientation
  • Dizziness
  • Nausea
  • Fainting
  • Chest pain
  • Unclear vision
  • Breathlessness


In a nutshell, Lorazepam does lower your blood pressure but it is very marginal. Lorazepam is a sedative drug and not suitable for long-term use. As Lorazepam is mainly prescribed for short-term use, it will not affect your blood pressure significantly.

If you are having high blood pressure issues, either high or low, or are on blood pressure medicine then you need to keep a check on your blood pressure after consuming Lorazepam. 

When used in short term Lorazepam can prove to be beneficial. Lorazepam can cause addiction. It is important to consume only as much as is required. Finally, maintain a healthy lifestyle to maintain good blood pressure.

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