To makes sure the Lactics acid doesn't kick in, here are the tell-tale signs that will secure a second win on the bounce.
An early goal
There was precious little difference in the way, Hoops have gone for the throat from the off over the last four games.
Assume there is an early Rs goal - going for the throat
Too many times over the last couple of seasons, Rs have been nervous about ramming home the advantage.
Against City, they went at it after Smith's goal, and on another day the two sides might have seen a 3-1 scoreline in favour of QPR at the break after Scott Sinclair grazed the bar for Blues.
Against Birmingham, Matt Smith's early goal not only settled nerves, but eased tensions.
Grant Hall's form
The defender turned defensive midfielder is a vital Rs asset when on song.
He has taken to the switch from centre back with some aplomb, and he delivers a mean ball. Remember the second goal against Brum scored by Conor Washington? It was Hall's chip that started it.
Making smart substitutions
Two tough games in four days takes its toll.
Conor Washington's pedometer readings must have been impressive at St Andrews; 12k and counting we reckon. Ryan Manning also put in the miles.
Making the switches when it matters is crucial.
Loftus Road in full voice
Those 1,500 plus fans at Birmingham helped see the side through.
But remember the Burton 2-1 home defeat? Never mind, the Highbury Library of old, there was a lofty silence for large chunks of a moribund game as alluded to by boss Ian Holloway.