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Bat Guano
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Laudanum is still available by prescription in the United States. It is classified as a Schedule II drug under the Controlled Substances Act. Its most common formulation is known as "deodorized tincture of opium," (or DTO), and is manufactured in the United States by Ranbaxy Pharmaceuticals. Deodorized or "denarcotized" opium means that narcotine, one of the most prevalent alkaloids in opium, has been removed, usually by a petroleum distillate. Narcotine has no analgesic properties, and frequently causes nausea and stomach upset; hence the preference for denarcotized opium.
The only medically-approved uses for laudanum in the United States are for treating diarrhea and pain. Laudanum, as deodorized opium tincture, contains the equivalent of 10 milligrams of morphine per milliliter. By contrast, laudanum's weaker cousin, paregoric, also known as camphorated tincture of opium, is 1/25th the strength of laudanum, containing only 0.4 milligrams of morphine per milliliter. Caution should be employed so as not to confuse opium tincture (laudanum) and camphorated opium tincture (paregoric), since overdose may occur if the former is used when the latter has been indicated. The United States Pharmacopia recommends that the abbreviation "DTO" never be used in place of "deodorized tincture of opium," since DTO is sometimes employed to abbreviate "diluted tincture of opium," which is a 1:25 dilution of opium tincture and water commonly employed to treat withdrawal symptoms in neonates. Further, paregoric's synonym "camphorated tincture of opium" should not be used, since it could easily be confused with "tincture of opium" or "deodorized tincture of opium." http://en.wikipedia.org/wiki/Laudanum
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