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(labetalol hydrochloride) Tablets
Trandate (labetalol) Tablets are adrenergic receptor blocking agents that have both selective alpha1-adrenergic and nonselective beta-adrenergic receptor blocking actions in a single substance.
Labetalol hydrochloride (HCl) is a racemate chemically designated as 2-hydroxy-5-[1-hydroxy-2-[(1methyl-3-phenylpropyl)amino]ethyl]benzamide monohydrochloride, and it has the following structure:
Labetalol HCl has the empirical formula C19H24N2O3•HCl and a molecular weight of 364.9. It has two asymmetric centers and therefore exists as a molecular complex of two diastereoisomeric pairs. Dilevalol, the R,R' stereoisomer, makes up 25% of racemic labetalol.
Labetalol HCl is a white or off-white crystalline powder, soluble in water.
Trandate Tablets contain 100, 200, or 300 mg of labetalol HCl and are taken orally. The tablets also contain the inactive ingredients corn starch, FD&C Yellow No. 6 (100- and 300-mg tablets only), hydroxypropyl methylcellulose, lactose, magnesium stearate, pregelatinized corn starch, sodium benzoate (200-mg tablet only), talc (100-mg tablet only), and titanium dioxide.
What are the possible side effects of labetalol (Normodyne, Trandate)?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have a serious side effect such as:
- slow or uneven heartbeats;
- feeling like you might pass out;
- feeling short of breath, even with mild exertion;
- swelling or rapid weight gain; or
- nausea, upper stomach pain, itching, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).
Less serious side...
What are the precautions when taking labetalol (Trandate)?
Before taking labetalol, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: certain types of heart rhythm problems (such as a slow heartbeat, second- or third-degree atrioventricular block), severe heart failure, breathing problems (such as asthma, chronic bronchitis, emphysema).
Before using this medication, tell your doctor or pharmacist your medical history, especially of: treated stable heart failure, kidney disease, liver disease,...
Last reviewed on RxList: 1/3/2011
This monograph has been modified to include the generic and brand name in many instances.
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