Infectious Diseases: Common cold or the flu?and season episode and how
Amphetamines are stimulant drugs, which means they speed up the messages travelling between the brain and the body. Some types of amphetamines are legally prescribed by doctors to treat conditions such as attention deficit hyperactivity disorder ADHD and narcolepsy where a person has an uncontrollable urge to sleep. Other types of amphetamines such as speed are produced and sold illegally. The more potent form is crystal methamphetamine ice. The appearance of amphetamines varies. Amphetamine powder can range in colour from white through to brown, sometimes it may have traces of grey or pink.
The production of methamphetamine — and the desire to consume it — is seemingly unstoppable. When precursor chemicals are brought under tight control in one country, like the United States, production simply moves to another country, such as Mexico. When Mexican authorities clamp down, it moves farther south, or into Europe or Asia. Then, the finished product is shipped right back into the very countries that have waged such a battle to eradicate it in the first place. Most meth smuggled into the United States is made in large labs — "superlabs" — in Mexico. There are many small meth labs in operation in the United States, but these mostly serve to feed the habits of the amateur cooks themselves.
Pseudoephedrine PSE is a sympathomimetic drug of the phenethylamine and amphetamine chemical classes. Pseudoephedrine is a stimulant , but it is well known for shrinking swollen nasal mucous membranes, so it is often used as a decongestant. It reduces tissue hyperemia , edema , and nasal congestion commonly associated with colds or allergies. Other beneficial effects may include increasing the drainage of sinus secretions, and opening of obstructed Eustachian tubes. The same vasoconstriction action can also result in hypertension , which is a noted side effect of pseudoephedrine. Pseudoephedrine can be used either as oral or as topical decongestant. However, due to its stimulating qualities, the oral preparation is more likely to cause adverse effects, including urinary retention.
Think twice before you take over-the-counter cold/flu medicine, warns pharmacist
All research funds are directly provided to, and managed by, the University of Queensland. - By Tegan Taylor. It's hard enough to tell your pseudoephedrine from your p henylephrine even when you're not sick.