Pfizer has posted a 100% increase in net profit at Rs 15.47 crore for the second quarter ended May 31, 2005 as against Rs 7.74 crore in Q2FY04.According to a release issued by the company to the BSE today, total income increased to Rs 145.13 crore for the quarter ended May 31, 2005 from Rs 144.95 crore in Q2FY04.