Is quetiapine a benzodiazepine?

You can get them from a general doctor, or a psychiatrist, but you usually have to have some type of anxiety disorder.

a typical antispsychotic that goes under the brand name seroquel, has a very sedating effect, useful in treating bipolar disorder schizophrenia and has many offlabel uses

Benzodiazepine usually ends in 'ZEPAM' while Non Benzodiazepine are drugs like antihistamine, Ssri, antihypertensive ect. but both are treatment for anxiety.

It is technically a minor tranquiliser, so it can have a sedative effect - particularly if combined with other depressant drugs like alcohol or heroin.

Yes and because recreational users of the medicine tend to get a tolerance and must take allot it happens often