Is Macbeth a drama

It is a Shakespeare play.

---- There is strong - nearly conclusive - evidence that Shakespeare collaborated with Thomas Middleton in writing Macbeth.

Perhaps Middleton collaborated with Shakespeare in writing the play, or perhaps he substantially revised it several years after it was first performed; but it seems certain that Middleton wrote the witches' songs, possibly the porter scene, and perhaps as much as 10% of the entire play.

Macbeth is not the only play where we have evidence of Shakespeare sharing the authorship with another writer. Pericles and Henry VI.1 are two other plays where it is highly likely that not every scene is by Shakespeare.

Collaborative authorship was not uncommon in the Elizabethan theatre - there are also plays by other dramatists where Shakespeare may have had a hand (Thomas More is one).

And Middleton was very, very good: he seems to have taken over the role of chief playwright with the Kings Men (Shakespeare's company) when Bill retired. Middleton also seems to have done some work on Measure for Measure and Timon of Athens. But the bulk of these plays is Shakespeare's, so really they are Shakespearean plays.