Few big TV advertisers spent more during May than they did last year. But GSK was up 29% year on year and was among the top 10 TV spenders.
The ironic reason in these times of slimmer budgets was its promotion of new weight-loss capsule Alli.
Over 2,000 30-second spots have been bought since the ad broke at the end of April, with GSK spending £600,000 on TV alone advertising its £1-a-day pill.