She was formerly Director of Research and Development Institute of the Government Pharmaceutical Organization (GPO), Ministry of Public Health, Thailand.
[2] Between 2002–2007 Kraisintu worked as a pharmaceutical consultant for Action Medeor, a German aid organization dealing with the production and distribution of medicines in Africa.
She is also a visiting professor of oriental medicines at the Harbin Institute of Technology, China.
[4] Krisana conducted research on anti-retroviral drugs without much support and successfully formulated a generic version of zidovudine (AZT), which treats HIV and reduces the risk of mother-to-child transmission, in 1995.
Her achievement raised the pharmaceutical and health profile of Thailand as the first developing country to manufacture generic HIV/AIDS drugs.