Priapism - erections lasting longer than four hours Sudden vision loss in one or both eyes, which is a symptom of a serious eye problem called non-arteric anterior ischesmic optic neuropathy NAION Chest pain Worsening shortness of breath Itching or burning during urination Rash Bleeding in the brain or lungs High blood pressure Heart attack Sudden hearing decrease, hearing loss, or ringing in the ears Dizziness or lightheadedness Fainting Stroke Irregular heartbeat Death
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