Както всички лекарства, Prepandemic influenza vaccine (H5N1) (split virion, inactivated, adjuvanted) GlaxoSmithKline Biologicals 3, 75 µg може да предизвика нежелани реакции, въпреки че не всеки ги получава.
Tāpat kā citas zāles, Prepandemic influenza vaccine (H5N1) (split virion, inactivated, adjuvanted) GlaxoSmithKline Biologicals 3. 75 µg var izraisīt blakusparādības, kaut arī ne visiem tās izpaužas.