Sometimes, a person's blood pressure suddenly increases significantly. This is an emergency. In such cases, one of the main drugs that is given in a hospital to quickly control blood pressure is a Labetalol injection. This is not a medicine to use at home. So today, let's talk about this Labetalol injection, in what cases it is given, what happens with it, and what you need to know about it.
Simply put, what is Labetalol?
Labetalol is a medicine used to control high blood pressure. Think of your heart as a water pump, and your blood vessels as the pipes that carry the water. High blood pressure means that the pressure inside those pipes is too high. This means that the heart has to work harder to pump blood throughout the body.
The drug Labetalol does two main things.
1. Slowing down the heartbeat: This reduces the workload on the heart.
2. Widening (relaxing) blood vessels: This allows blood to move more easily throughout the body.
Due to these two factors, high blood pressure is controlled, the pressure on the heart is reduced, and an environment is created where it can work more easily. This medicine belongs to the group of drugs called beta-blockers .
How do you use this medicine?
This is very important. Labetalol is not a medicine that you can pick up at a pharmacy and take home. It is a medicine that is given as an injection, injected into a vein . Also, it is only given under medical supervision in a hospital or clinic .
This vaccine is usually given when a person's blood pressure is very high and there is a hypertensive emergency. In such cases, the patient is admitted to the hospital's Emergency Treatment Unit (ETU) or Intensive Care Unit (ICU) and a doctor or nurse administers this vaccine.
The most important thing is that while you are taking this medicine, your heart rate and blood pressure will be continuously monitored with machines. This is because you need to lower your blood pressure and see if it is getting too low.
What to do if you overdose?
Since this is given in a hospital, the chances of this happening are very low. However, if you think that something like this has happened in any way, you should inform the medical staff immediately. Alternatively, you can call the National Poisons Information Centre at the Colombo National Hospital for advice. But remember, since this is a medicine given in a hospital, that responsibility lies entirely with the medical team.
Things you need to tell your doctor before taking this medicine
Before deciding to give you Labetalol, your doctor will ask you about your health. It is important for your safety to be honest and truthful during this time.
| Your medical condition | Why is notification important? |
|---|---|
| Diabetes | This medication may mask some of the symptoms of low blood sugar (hypoglycemia) (e.g., increased heart rate). Therefore, it is imperative to inform your doctor if you are diabetic. |
| Heart Disease | If you already have heart failure or other heart disease, this medicine should be given with great caution. |
| Liver Disease | Labetalol is cleared from the body by the liver. If you have liver disease, the effects of the drug may be increased. |
| Lung diseases (e.g. asthma) | This medicine may cause breathing difficulties in some people. This medicine should not be given if you have a condition such as asthma. |
| Allergies | If you have ever had an allergy to Labetalol or any other beta-blocker medication, you should mention it. |
| Pregnancy or breastfeeding | It is essential to inform your doctor if you are pregnant, trying to become pregnant, or breastfeeding. |
Other drugs that may interact with this medicine (Drug Interactions)
A "Drug Interaction" is when one medicine you take affects the way another medicine you take works. Therefore, you should tell your doctor about all the medicines you are taking (including those prescribed by other doctors, those bought at the pharmacy, traditional medicines, and vitamins) .
Some medications that may interact with labetalol include:
- Some medications for lung diseases like asthma (e.g. Albuterol)
- Other blood pressure medications, heart disease medications
- Some medications for mental illnesses such as depression
- Cimetidine (a medicine for gastritis)
- Halothane (a drug used for anesthesia)
- Nitroglycerin (a medicine for heart disease)
This list is not complete, so it's best to tell your doctor about everything you take.
Side effects of the medicine
Like any medicine, Labetalol can cause side effects in some people. Some of these are serious, while others are mild. Since this medicine is given in a hospital setting, you can tell your doctor or nurse right away if you experience any of these.
| Serious side effects that require immediate medical attention | |
|---|---|
| Allergic Reactions | Skin rash, itching, swelling of the face, lips, tongue. |
| Heart Failure Symptoms | Difficulty breathing, swelling of the ankles and feet, sudden weight gain, extreme fatigue. |
| Symptoms of Liver Injury | Pain in the upper right side of the stomach, loss of appetite, nausea, yellowing of the skin or eyes, dark urine. |
| Low Blood Pressure | Dizziness (vertigo), blue eyes, fainting. |
| Slow Heartbeat | Dizziness, fainting, difficulty breathing, extreme fatigue. |
| Things that are usually not serious, but should be reported to the doctor if they persist | |
| Dizziness | This can usually occur when starting the medication. |
| Fatigue | Feeling of lifelessness. |
| Headache | A slight headache may occur. |
Take-Home Message
- Labetalol is a medicine used to treat high blood pressure and is only given in a hospital in an emergency. It is not a medicine for home use.
- While you are taking this medicine, your blood pressure and heart rate will be continuously monitored by the medical team.
- If you have conditions such as diabetes, asthma, heart disease, or liver disease, it is imperative that you tell your doctor before prescribing the medication.
- Tell your doctor about all other medications you are taking.
- If you experience any unusual symptoms such as dizziness, difficulty breathing, or chest pain while taking the medicine, inform the doctor or nurse immediately.
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