Many medications can cause side effects. A side effect is an unwanted response to a medication when it is taken in normal doses. Side effects can be mild or severe, temporary or permanent.

The side effects listed below are not experienced by everyone who takes Trandate (Labetalol). If you are concerned about side effects, discuss the risks and benefits of Trandate (Labetalol) with your doctor.

The following side effects have been reported by at least 1% of people taking Trandate (Labetalol). Many of these side effects can be managed, and some may go away on their own over time.

Contact your doctor if you experience these side effects and they are severe or bothersome. Your pharmacist may be able to advise you on managing side effects.

• dizziness
• headache
• nausea
• unusual tiredness
• vomiting

Although most of these side effects listed below don't happen very often, they could lead to serious problems if you do not seek medical attention.

Check with your doctor as soon as possible if any of the following side effects occur:

• breathing difficulty or wheezing
• dizziness or lightheadedness when getting up from a lying down or sitting position
• joint or muscle pain
• signs of heart problems (e.g., fast, irregular heartbeat or pulse, chest pain, sudden weight gain, difficulty breathing, leg swelling)
• signs of liver problems (e.g., nausea, vomiting, Diarrhea, loss of appetite, weight loss, yellowing of the skin or whites of the eyes, dark urine, pale stools)
• slow heartbeat (especially less than 50 beats per minute)

Stop taking the medication and seek immediate medical attention if any of the following occur:

• signs of a serious allergic reaction (e.g., abdominal cramps, difficulty breathing, nausea and vomiting, or swelling of the face and throat)

Some people may experience side effects other than those listed. Check with your doctor if you notice any symptom that worries you while you are taking Trandate (Labetalol).

100 mg
Each orange, capsule-shaped tablet, scored and engraved "LAB 100" on one side and "PLB" on the other side, contains Trandate (Labetalol) HCl 100 mg. Nonmedicinal ingredients: colloidal silicon dioxide, croscarmellose sodium, D&C Yellow No. 10, hydroxypropyl cellulose, hydroxypropyl methylcellulose, magnesium stearate, methylcellulose, polyethylene glycol, purified water, Sunset Yellow Lake 40%, and titanium dioxide.

200 mg
Each white, capsule-shaped tablet, scored and engraved "LAB 200" on one side and "PLB" on the other side, contains Trandate (Labetalol) HCl 200 mg. Nonmedicinal ingredients: colloidal silicon dioxide, croscarmellose sodium, hydroxypropyl cellulose, hydroxypropyl methylcellulose, magnesium stearate, methylcellulose, polyethylene glycol, purified water, and titanium dioxide.

Do not take this medication if you:

• are allergic to Trandate (Labetalol) or any ingredients of the medication
• are experiencing cardiogenic shock with very Low Blood Pressure
• have a severely slow heart rate
• have Asthma or a history of obstructive airway disease such as emphysema or chronic Bronchitis
• have serious heart block
• have uncontrolled Congestive Heart Failure
• have severely decreased blood flow in your feet and your legs (peripheral artery disease)

There may be an interaction between Trandate (Labetalol) and any of the following:

• Aldesleukin
• Aliskiren
• alpha agonists (e.g., Clonidine, methyldopa)
• alpha blockers (e.g., Alfuzosin, Doxazosin, Tamsulosin)
• alpha/beta agonists (e.g., epinephrine, norepinephrine)
• Amiodarone
• amifostine
• amphetamines (e.g., Dextroamphetamine, lisdexamphetamine)
• angiotensin converting enzyme inhibitors (ACEIs; Captopril, Enalapril, Ramipril)
• angiotensin receptor blockers (ARBs; e.g., candasartan, Irbesartan, Losartan)
• antipsychotics (e.g., Chlorpromazine, Clozapine, Haloperidol, Olanzapine, Quetiapine, Risperidone)
• barbiturates (e.g., butalbital, pentobarbital Phenobarbital)
• beta-adrenergic blockers (e.g., Atenolol, Propranolol, Sotalol)
• beta-2 agonists (e.g., formoterol, salbutamol, salmeterol)
• brimonidine
• calcium channel blockers (e.g., Amlodipine, Diltiazem, Nifedipine, Verapamil)
• Ceritinib
• chloroquine
• clonidine
• Digoxin
• Dipyridamole
• Disopyramide
• diuretics (water pills; e.g., Furosemide, Hydrochlorothiazide, triamterene)
• Donepezil
• Dronedarone
• Duloxetine
• ergot alkaloids (e.g., ergotamine, Dihydroergotamine)
• Fentanyl
• Fingolimod
• Galantamine
• grass pollen allergen extract
• Guanfacine
• hydroxychloroquine
• insulin
• Lacosamide
• Lanreotide
• levodopa
• Methylphenidate
• Minoxidil
• nitrates (e.g., Nitroglycerin, isosorbide dinitrate, isosorbide mononitrate)
• non-steroidal anti-inflammatory medications (NSAIDs; e.g., Diclofenac, Ibuprofen, Naproxen)
• Obinutuzumab
• Octreotide
• Pasireotide
• Pentoxifylline
• phosphodiesterase-5 inhibitors (e.g., Sildenafil, Tadalafil, Vardenafil)
• Pilocarpine
• Pramipexole
• Propafenone
• quinine
• Rasagiline
• Regorafenib
• rifabutin
• rifampin
• Rivastigmine
• Ropinirole
• Selegiline
• sufentanil
• sulfonylureas (e.g., Gliclazide, Glyburide, Tolbutamide)
• theophyllines (e.g., Aminophylline, Oxtriphylline, Theophylline)
• Tizanidine
• Tofacitinib
• tolcapone

If you are taking any of these medications, speak with your doctor or pharmacist. Depending on your specific circumstances, your doctor may want you to:

• stop taking one of the medications,
• change one of the medications to another,
• change how you are taking one or both of the medications, or
• leave everything as is.

An interaction between two medications does not always mean that you must stop taking one of them. Speak to your doctor about how any drug interactions are being managed or should be managed.

Medications other than those listed above may interact with Trandate (Labetalol). Tell your doctor or prescriber about all prescription, over-the-counter (non-prescription), and herbal medications you are taking. Also tell them about any supplements you take. Since caffeine, alcohol, the Nicotine from cigarettes, or street drugs can affect the action of many medications, you should let your prescriber know if you use them.

Before you begin using a medication, be sure to inform your doctor of any medical conditions or Allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. These factors may affect how you should use Trandate (Labetalol).

Breathing conditions: In general, people who have asthma and certain other breathing problems should avoid taking a beta-blocker such as Trandate (Labetalol), as this group of medications can cause breathing difficulty. If you have breathing problems and your doctor has prescribed Trandate (Labetalol) for you, it may be at a lower dose, and your doctor will monitor you regularly while you are taking Trandate (Labetalol). If you have breathing problems, discuss with your doctor how Trandate (Labetalol) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Trandate (Labetalol), and whether any special monitoring is needed.

Diabetes: The signs of low blood sugar may not be as noticeable when taking Trandate (Labetalol). If you have diabetes and take insulin or other medications that work by reducing the blood sugar, discuss with your doctor how Trandate (Labetalol) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Trandate (Labetalol), and whether any special monitoring is needed.

Dizziness: Move slowly when moving from a lying down or sitting position to a standing position as dizziness may occur, especially when Trandate (Labetalol) is first being started.

Dry eyes: Dry eyes have been reported with the use of Trandate (Labetalol).

Heart disease: Beta-blockers, such as Trandate (Labetalol), can worsen existing heart failure. It is important to take Trandate (Labetalol) exactly as prescribed by your doctor to decrease the chance of this happening. If you have a history of heart disease, discuss with your doctor how Trandate (Labetalol) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Trandate (Labetalol), and whether any special monitoring is needed.

Hyperthyroidism (high level of Thyroid hormones): Trandate (Labetalol) may reduce the symptoms of hyperthyroidism and give a false impression of improvement. Stopping Trandate (Labetalol) suddenly could cause hyperthyroidism to become worse. If you have a history of thyroid disease, discuss with your doctor how Trandate (Labetalol) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Trandate (Labetalol), and whether any special monitoring is needed.

Liver function: Liver disease or reduced liver function may cause Trandate (Labetalol) to build up in the body, causing side effects. If you have liver problems, discuss with your doctor how Trandate (Labetalol) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Trandate (Labetalol), and whether any special monitoring is needed. Your doctor may want to test your liver function regularly with blood tests while you are taking Trandate (Labetalol).

Rarely, liver injury has been reported with the use of Trandate (Labetalol). If you experience symptoms of liver problems such as fatigue, feeling unwell, loss of appetite, nausea, yellowing of the skin or whites of the eyes, dark urine, pale stools, abdominal pain or swelling, and itchy skin, contact your doctor immediately.

Pheochromocytoma: Although Trandate (Labetalol) is used to treat the high blood pressure that is a symptom of pheochromocytoma (a tumour of the adrenal gland), it has been known to worsen the symptoms it is supposed to be treating. If you have a pheochromocytoma, discuss with your doctor how Trandate (Labetalol) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Trandate (Labetalol), and whether any special monitoring is needed.

Severe allergies: If you have allergies severe enough to cause Anaphylaxis (severe allergic reaction) (a severe allergic reaction where swelling of the face, lips, and throat make it difficult to breathe), discuss with your doctor what to do if you have an allergic reaction. Trandate (Labetalol), like other beta-blockers, may make it more difficult to treat severe allergic reactions with Epinephrine.

Skin conditions: Various skin rashes have been reported with the use of Trandate (Labetalol).

Stopping the medication: Trandate (Labetalol) should not be stopped suddenly. People with heart disease who stop taking Trandate (Labetalol) abruptly may experience serious effects, such as severe worsening of Angina, Heart Attack, or abnormal heart rhythms. If you have heart disease, do not stop taking Trandate (Labetalol) without checking with your doctor first. When this medication needs to be stopped, it should be done gradually, under the supervision of your doctor.

Surgery: If you are scheduled for surgery, inform all health care professionals involved in your care that you are taking Trandate (Labetalol).

Pregnancy: Trandate (Labetalol) should not be used during pregnancy unless the benefits outweigh the risk. If you become pregnant while taking Trandate (Labetalol), contact your doctor immediately.

Breast-feeding: Trandate (Labetalol) passes into breast milk. If you are a breast-feeding mother and are taking Trandate (Labetalol), it may affect your baby. Talk to your doctor about whether you should continue breast-feeding.

Children: The safety and effectiveness of using this medication have not been established for children.

Seniors: Seniors may be more sensitive to the side effects of Trandate (Labetalol) and may require lower doses.