WHO Warns Against Taking Painkillers Before Getting Covid-19 Vaccine; Here’s Why The World Health Organization has warned that the use of pain killers before the Covid-19 vaccine is not recommended to prevent possible side-effects, as it may affect the effectiveness of the vaccine. Dr. Sushil Jain 09 July 2021, Last Updated at 1:38 pm Representational image Dr. Sushil Jain 2021-07-09T00:07:50+05:30 WHO Warns Against Taking Painkillers Before Getting Covid-19 Vaccine; Here’s Why outlookindia.com 2021-07-09T13:38:47+05:30 Also read If you are fortunate enough to be getting a vaccine against the Covid19 soon, you may want to ensure it is as effective as possible by not taking over-the-counter nonsteroidal anti-inflammatory drugs (NSAIDs) before you get the injection.