Le?nik može procijeniti vaš rizik od nuspojava i preporu?iti najbolji tretman za vaše specifi?ne potrebe.The most common Unwanted side effects of VIAGRA: headache; flushing; upset abdomen; irregular vision, like adjustments in colour eyesight (for instance using a blue color tinge) and blurred vision; stuffy or runny nose; back ache; muscle sore