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Basic Info
CAS Number
N/A
Pharmacopoeia
ChP
Grade
In-house Standards
Is Manufacturer
YES
Packaging & Delivery
Minimum Order Quantity
Any
Delivery Cycle
Negotiable
Product Description
Reference Standards &Impurity
AI Product Description
*The following content is generated by AI and is for reference only.
Methyldopa, chemically known as alpha-methyldopa, is a centrally acting antihypertensive agent widely utilized in clinical settings for the management of high blood pressure. Its molecular formula is C10H13NO4, and it is uniquely identified by the CAS Registry Number 55-96-7. Structurally, this compound belongs to the class of alpha-methylnorepinephrine analogs, which allows it to cross the blood-brain barrier effectively. Once inside the central nervous system, methyldopa undergoes decarboxylation and hydroxylation to form alpha-methylnorepinephrine. This active metabolite acts as a false neurotransmitter, accumulating in presynaptic nerve terminals where it stimulates central alpha-2 adrenergic receptors. The activation of these receptors inhibits sympathetic outflow from the brainstem, leading to a reduction in peripheral vascular resistance and cardiac output, thereby lowering systemic arterial pressure.
The primary therapeutic application of methyldopa is in the treatment of essential hypertension, particularly during pregnancy. Due to its extensive safety profile over decades of use, it remains the drug of choice for managing gestational hypertension when pharmacological intervention is necessary. It is generally considered safe for both the mother and the developing fetus, with minimal risk of adverse effects on fetal growth or development compared to other antihypertensive classes. Beyond pregnancy, it is occasionally prescribed for chronic hypertension in patients who cannot tolerate newer agents like ACE inhibitors or calcium channel blockers, although its use has declined due to the availability of drugs with fewer side effects and simpler dosing schedules.
Common side effects include sedation, dry mouth, dizziness, and gastrointestinal disturbances. A notable but rare adverse reaction is Coombs-positive hemolytic anemia, which occurs in approximately 10% of patients after prolonged therapy and requires monitoring. Despite the emergence of more modern antihypertensives, methyldopa retains a critical role in specific populations, ensuring its continued relevance in global cardiovascular care protocols. Its mechanism of action distinguishes it from direct vasodilators or diuretics, offering a unique pathway for blood pressure control through central nervous system modulation.
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