Methopyrapone

Methopyrapone Brand names, Methopyrapone Analogs

Methopyrapone Brand Names Mixture

No information avaliable

Methopyrapone Chemical_Formula

C₁₂H₁₈N₂O₄

Methopyrapone RX_link

http://www.rxlist.com/cgi/generic3/midodrine.htm

Methopyrapone fda sheet

Methopyrapone FDA

Methopyrapone msds (material safety sheet)

Methopyrapone Synthesis Reference

No information avaliable

Methopyrapone Molecular Weight

254.282 g/mol

Methopyrapone Melting Point

200 to 203°C

Methopyrapone H₂O Solubility

Soluble

Methopyrapone State

Solid

Methopyrapone LogP

0.159

Methopyrapone Dosage Forms

2.5-mg and 5-mg tablets for oral administration

Methopyrapone Indication

For the treatment of symptomatic orthostatic hypotension (OH).

Methopyrapone Pharmacology

Midodrine is a prodrug, i.e., the therapeutic effect of orally administered midodrine is due to the major metabolite desglymidodrine formed by deglycination of midodrine. Desglymidodrine diffuses poorly across the blood-brain barrier, and is therefore not associated with effects on the central nervous system. Administration of midodrine results in a rise in standing, sitting, and supine systolic and diastolic blood pressure in patients with orthostatic hypotension of various etiologies. Standing systolic blood pressure is elevated by approximately 15 to 30 mmHg at 1 hour after a 10-mg dose of midodrine, with some effect persisting for 2 to 3 hours. Midodrine has no clinically significant effect on standing or supine pulse rates in patients with autonomic failure.

Methopyrapone Absorption

Rapidly absorbed following oral administration. The absolute bioavailability of midodrine (measured as desglymidodrine) is 93% and is not affected by food.

Methopyrapone side effects and Toxicity

Symptoms of overdose could include hypertension, piloerection (goosebumps), a sensation of coldness and urinary retention. The single doses that would be associated with symptoms of overdosage or would be potentially life- threatening are unknown. The oral LD₅₀ is approximately 30 to 50 mg/kg in rats, 675 mg/kg in mice, and 125 to 160 mg/kg in dogs. Desglymidodrine is dialyzable.

Methopyrapone Patient Information