Labetalol belongs to a class of medications called beta-blockers. It slows down the activity of your heart by stopping the transmission of messages from the nerves to your heart. It acts on the heart and blood vessels and therefore reduces blood pressure. Labetalol is used in emergency and regular treatment of hypertension, hypertension after myocardial infarction, and hypertension in pregnancy.
Labetalol can be taken by mouth for the treatment of regular hypertension and hypertension in pregnancy. Oral Labetalol should be taken with food immediately after meals.
Labetalol may also be injected through a needle into a vein as directed by your doctor for the treatment of hypertensive emergencies and hypertension after myocardial infarction.
High blood pressure
Adult
Oral: Initially 100 mg twice daily. May increase gradually at intervals of 14 days according to response to 200-400 mg twice daily. Maximum dosage is 2-4 g per day in 2-4 divided doses.
Elderly
Oral: Initially 50-100 mg twice daily. Maintenance dose is 100-200 mg twice daily.
Hypertension in pregnancy
Adult
Oral: Initially 100 mg twice daily. May increase gradually at intervals of 14 days according to response to 200-400 mg twice daily. Maximum dosage is 2-4 g per day in 2-4 divided doses.
Intravenous infusion: Initially 20 mg/hour, which may be doubled every 30 minutes until satisfactory response. Usual maximum dosage is 160 mg/hour.
Common side effects of Labetalol include slow heartbeat, oedema, depression, dizziness, shortness of breath, erectile dysfunction, fatigue, headache, and heart failure.
Common dosing schedule:
Labetalol should be taken immediately after meals.
This schedule is for reference only, adjustments may be made according to individual needs.
Some common medications Labetalol may interact with:
Labetalol can interact with a number of drugs. Please notify your doctor or pharmacist if you are taking the above medication, dosage adjustments might be needed.
In Hong Kong, Labetalol is a prescription only medicine, and requires a prescription from a doctor to be purchased in a pharmacy. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.
For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at https://www.drugoffice.gov.hk
Need more information?
For detailed information about the use of Labetalol in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.
Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.
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