Drogba is infamous for his on-field strops, but accepts manager Carlo Ancelotti's choice.
Drogba, with four goals already this season, said: "I like taking penalties because it's a big responsibility.
"But it's clear Lamps is the first one to take penalties for us and only if he is not on the pitch do I take them.
"I took the one against Stoke because he wasn't on the pitch.
"Frank has scored so many penalties for Chelsea.
"That's why he will take the next one too."