Recent Examples on the WebThe Pfizer vaccine’s ingredients also include lipids (including PEG), potassium chloride, monobasic potassium, phosphate, sodium chloride, dibasic sodium phosphate dihydrate and sucrose. Julie Washington, cleveland, 13 Aug. 2021 The Pfizer/BioNTech Covid-19 vaccine ingredient list includes mRNA, lipids, potassium chloride, monobasic potassium phosphate, sodium chloride, dibasic sodium phosphate dihydrate, and sucrose. Bruce Y. Lee, Forbes, 18 May 2021