cough syrup
It occurs all the time and any drug can be abused. In most cases, drugs that are legal when prescribed by a doctor are illegal if they are obtained through any other means. Yes if people use drugs the wrong way they can become illegal.
If I have a bottle of Oxycontin obtained in my name with a legal prescription, I can't be arrested. The same amount of heroin would get me buried beneath the jail. Legal drugs are in most cases easier and safer to obtain, and it is legal to possess them. They can be obtained legally, and then diverted to illegal uses. The most commonly-abused legal drug in the US is alcohol.
legal drugs
There is no legal age to take drugs. Hence the name "illegal drugs". It doesn't matter what age a person is, drugs are illegal unless prescribed by a doctor. Marijuana is legal medically in very few states and illegal for fun everywhere.
In terms of the number of different drugs that are available, there are vastly more legal drugs than illegal drugs. I would also say that legal drugs are used more frequently and by more people than illegal drugs are.
Legal drugs are legal, illegal drugs are not. Also some drugs that are illegal on the street are legal if you have a serious disease such as codeine. It is a strong pain killer that is usually given to patients that have recently undergone surgery.
People who do not use drugs are not at risk for legal penalties related to the use of illegal drugs.
Legal drugs are drugs that are perscribed just for you and you take them as it is written on your perscription. Illegal drugs are any drug you can buy on the street The question asks about 'acts' not 'drugs'. An illegal act is against the law, a legal act is permitted.
Legal drugs often have medicinal value, such as painkillers, antibiotics, chemotherapeutic agents, etc. Some of these are abused for their effects. Normally, painkilling or depressant drugs are used for this. Illegal drugs - including otherwise legal drugs used for nonlegal purposes - usually have enjoyable effects and are always a consumer good. "Getting high" is a fairly common pastime in many areas. Any such usage is normally considered abuse by some groups.
Legal drugs are intended to treat disease. Illegal drugs, in comparison, are intended to be fun. In both cases, legal or illegal, you can expect side-effects.
Most common illegal narcotics abused are cocaine, crack-cocaine, heroine, crystal meth, and psychological hallucinogens such as acid, mushrooms, and ecstasy. Also, a lot of the more abused drugs are the ones that're completely legal, whereas they require a prescription from a doctor, nurse or psychologist. Some names of the drugs being Xanax, Tramadol, Lorazepam, Codeine (Tylenol 4+), Morphine, and Oxycodone.