Cephalosporins are used to fight,
Bacterial infections, day and night.
From skin to the lungs,
For the old and the youngs.
For gram-positive bacteria bring a knife to a gunfight
There once was a client allergic to penicillin
A rash would appear, like a curse from a villain
Though the cross-reactivity
Is not as high as we'd see,
Caution's advised lest it kill him.
The moral of this limerick, so true:
Using cephalosporins with care is what you should do.
Weigh the benefits and risks,
And follow the doctor's tips,
Take every dose 'til it's through.