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Methylephedrine, sold under the brand name Metheph among others, is a sympathomimetic medication described as an antiasthmatic agent and used to treat coughing and nasal congestion. [ 3 ] [ 4 ] [ 1 ] It is reported to be used in various over-the-counter cough and cold preparations throughout the world, including Japan .
Levmetamfetamine, also known as l-desoxyephedrine or levomethamphetamine, and commonly sold under the brand name Vicks VapoInhaler among others, is an optical isomer of methamphetamine primarily used as a topical nasal decongestant. [2]
A decongestant, or nasal decongestant, is a type of pharmaceutical drug that is used to relieve nasal congestion in the upper respiratory tract.The active ingredient in most decongestants is either pseudoephedrine or phenylephrine (the latter of which has disputed effectiveness).
As a cough suppressant, the polistirex version lasts up to 12 hours. This duration also holds true when used recreationally. In 1981, a paper by Gosselin estimated that the lethal dose is between 50 and 500 mg/kg. Doses as high as 15–20 mg/kg are taken by some recreational users.
Propylhexedrine works mainly as an adrenergic agonist, when used at therapeutic doses in an inhaler dosage form. [21] This restricts the blood vessels in the nose and reduces swelling; thereby, it relieves nasal congestion. [22] At higher doses, propylhexedrine affects the central nervous system as a norepinephrine–dopamine releasing agent ...
The range contains 200 mg of guaifenesin which helps to relieve chesty cough, in addition to 1000 mg of paracetamol and 12.2 mg of phenylephrine hydrochloride (12.18 mg of phenylephrine hydrochloride in Lemsip Max All In One Liquid) which aims to relieve headache, sore throat, fever, body aches and pains, and a blocked nose.
A wide variety of alkaloid and non-alkaloid compounds have been identified in various species of Ephedra.Of the six ephedrine-type ingredients found in ephedra (at concentrations of 0.02-3.4%), the most common are ephedrine and pseudoephedrine, [13] which are the sources of its stimulant and thermogenic effects. [4]
Coricidin, Coricidin 'D' (decongestant), or Coricidin HBP (for high blood pressure), is the name of an over-the-counter cough and cold drug containing dextromethorphan (a cough suppressant) and chlorpheniramine maleate (an antihistamine). [1] Introduced by Schering-Plough in 1949 as one of the first antihistamines, it is now owned by Bayer.