pentawinSide Effects of Pentawin are Dizziness, Vomiting, Nausea, Euphoria (feeling of intense excitement and happiness), Injection site reactions (pain, swelling, redness). How Pentawin ProductsSide Effects of Pentawin are Dizziness, Vomiting, Nausea, Euphoria (feeling of intense excitement and happiness), Injection site reactions (pain, swelling, redness). How Pentawin Products