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Phenylpropanolamine was first synthesized in the early 20th century, in or around 1910. [21] [11] It was patented as a mydriatic in 1913. [21] The pressor effects of phenylpropanolamine were characterized in the late 1920s and the 1930s. [21] Phenylpropanolamine was first introduced for medical use by the 1930s. [23] [11]
Verapamil, sold under various trade names, [1] is a calcium channel blocker medication used for the treatment of high blood pressure, angina (chest pain from not enough blood flow to the heart), and supraventricular tachycardia. [9]
After single oral administration of 100 mg the maximum plasma concentration is reached after 3 hours and amounts to 33.2 ng/mL. [3] Therapeutic concentrations of opipramol range from 140 to 550 nmol/L. [ 26 ] The plasma protein binding amounts to approximately 91% and the volume of distribution is approximately 10 L/kg. [ 3 ]
Norephedrine (phenylpropanolamine) is an active metabolite of ephedrine formed via N-demethylation. [ 6 ] [ 10 ] About 8 to 20% of an oral dose of ephedrine is demethylated into norephedrine, about 4 to 13% is oxidatively deaminated into benzoic acid , and a small fraction is converted into 1,2-dihydroxy-1-phenylpropane.
Some β-hydroxyamphetamines have had their side chain extended and cyclized.Examples include certain substituted phenylmorpholines like phenmetrazine and phendimetrazine and their analogues; substituted phenylmorpholines related to bupropion like radafaxine (cyclized (2S,3S)-hydroxybupropion) and manifaxine; certain substituted aminorexes like 4-methylaminorex and 4,4'-dimethylaminorex; and ...
The primary application for phentolamine is for the control of hypertensive emergencies, most notably due to pheochromocytoma. [5]It also has usefulness in the treatment of cocaine-induced cardiovascular complications, where one would generally avoid β-blockers (e.g. metoprolol), as they can cause unopposed α-adrenergic mediated coronary vasoconstriction, worsening myocardial ischemia and ...
[6] [6] Peak concentrations of phentermine are reached 6 hours following oral administration of a dose of 15 mg. [6] The steady-state levels of phentermine with continuous administration have been found to be around 200 ng/mL in clinical studies. [6] The oral bioavailability of phentermine is not affected by intake of a high-fat meal. [6]
The Brazilian Controlled Drugs and Substances Act (Portuguese: Regulamento Técnico sobre substâncias e medicamentos sujeitos a controle especial), officially Portaria nº 344/1998, [1] is Brazil's federal drug control statute, issued by the Ministry of Health through its National Health Surveillance Agency (Anvisa).