Protesters today dressed up in white lab coats to demonstrate against drug giant GlaxoSmithKline's whose policies, they claim, keep the cost of some medicines high.
Between 20 and 30 demonstrators gathered outside the annual general meeting of the firm at the Queen Elizabeth conference centre in central London and handed out pill boxes which contained information on about their campaign.
They also plan to question GSK chiefs during the meeting.
The demonstration comes as the company announces another round of massive profits.
Critics claim that the drug companies' enforcement of patents in poorer countries protects their monopolies and prevents people from buying cheaper generic treatments.
Sophia Tickell, the senior policy adviser for Oxfam said the charity wanted the company to "relax their policy on patent enforcement in developing countries."
She also called on the firm to fund research on diseases like malaria and tuberculosis.