Analgesic
An analgesic is a drug that relieves pain without causing any harm but may have some sideafects such as causing tiredness ect. So yes you do use an analgesic.
The San Pedro cactus is rich with mescaline, making it a psychoactive drug. It startes by making you tired and dizzy, causing a light numbness. Even after the drug has mostly worn off you are most likely to still feel more acute senses for a couple days. Of course, like any psychoactive drug, it will cause various results for all users.
A stable drug user is like a functional alcoholic. They are able to use their drug-of-choice without legal problems, job loss, or causing harm to themselves, friends, associates and family. It is however, quite rare.
Poor blood flow could cause numbness...try drinking water regularly, past or current drug use could cause this, or also scarred tissue due to burns or frostbite.
It is a myth that alcohol is a gateway drug causing people to progress to marijuana, cocaine, etc.
You feel you can't live without the drug
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Drug tolerance is the ability to withstand increasing amounts of a drug without manifesting adverse effects or desired therapeutic effects. Tolerance often requires higher doses of a drug to achieve the same effect, and can result in reduced efficacy or the need for alternative treatments.
biologic interaction
It is possible to get pregnant with PCOS without the use of fertility drugs. You may be prescribed Metformin (a diabetes medication, not fertility drug) to help regulate your blood sugar and balance your hormones, causing more regular cycles.
How about drug dealer, then you don't need to worry about the drug test.
drug for what ? cannot answer your question without further information please