May 1 (Reuters) - Pfizer beat first-quarter profit estimates on Wednesday, benefiting from cost cuts and strong sales for its pneumonia and respiratory synctitial virus vaccines.

The U.S. drugmaker posted an adjusted profit of 82 cents per share, while analysts on average were expecting it to earn 52 cents, according to LSEG data.

(Reporting by Bhanvi Satija and Sriparna Roy in Bengaluru; Editing by Arun Koyyur)