Buy Penegra 100mg Buy Penegra 100mg If you think there was an overdose, call your local poison control center or ER right away. Signs of a very bad reaction to the drug. These include wheezing; chest tightness; fever; itching; bad cough; blue or gray skin color; seizures; or swelling of face, lips, tongue, or throat. Erection that lasts more than 4 hours. Trouble breathing. Chest pain or pressure or a fast heartbeat. Very bad dizziness or passing out. Sudden change or loss of eyesight. Change in hearing. Any rash. Side effect or health problem is not better or you are feeling worse.