Conversation so far:
When was Dexys founded?
1978.
who founded Dexy?
Kevin Rowland (vocals, guitar, at the time using the pseudonym Carlo Rolan) and Kevin "Al" Archer (vocals, guitar).
How did they know each other?
Both had been in the short-lived punk band the Killjoys.
what was their first single?
Dance Stance.
when was Dance Stance released?
was released on the independent Oddball Records.
did they recruit others?
" "Big" Jim Paterson (trombone), Geoff "JB" Blythe (saxophone, previously of Geno Washington's Ram Jam Band).
Did any of the band members ever leave?
By the middle of 1979, Bobby "Jnr" Ward had replaced Jay on drums.
Where did the band get it's name from?
The band's name was derived from Dexedrine.

Question: what is Dexedrine?
Self-contained rewrite: what is Dexedrine?