why is l-dopa usually given in combination with carbidopa
Carbidopa/levodopa It is primarily used to improve the symptoms of Parkinson's disease but does not change the course of the disease.[1] It can take two to three weeks of treatment before benefits are seen.[2] Each dose then begins working in about ten minutes with a duration of effect of about five hours.[2][3]
Saigon cinnamon Saigon cinnamon (Cinnamomum loureiroi, also known as Vietnamese cinnamon or Vietnamese cassia and quế trà my, quế thanh, or " quế trà bồng" in Vietnam) is an evergreen tree indigenous to mainland Southeast Asia. Despite its name, Saigon cinnamon is more closely related to cassia (C. cassia) than to cinnamon (C. verum, “true cinnamon”, Ceylon cinnamon), though in the same genus as both. Saigon cinnamon has 1-5% essential oil in content and 25% cinnamaldehyde in essential oil, which is the highest of all the cinnamon species.[citation needed] Consequently, among the species, Saigon cinnamon commands relatively high price.