The objective of the study was to determine the satisfaction with respect to the information received about health care and the prevention of medical fake news on Facebook during the COVID-19 pandemic in Peru, identifying differences with respect to gender and age. A cross-sectional investigation was carried out with 290 people who previously participated for 5 months on a voluntary basis in a Facebook group managed by health professionals. Data collection and analysis was performed using an online questionnaire and the SPSS program, respectively. The Chi square test was applied. A majority proportion of people satisfied with the information received was evidenced, with an average score of 4.14 on a scale of 1 to 5. Young people and women presented higher satisfaction values. It was concluded that there were high levels of satisfaction with the information received on health care and the prevention of medical fake news on Facebook during the COVID-19 pandemic in Peru. The promotion of netiquette or rules of cordiality on Facebook is an aspect that needs to be improved.