The most common side effects of generic Forzest tablets are facial flushing, headaches, stomach upset, diarrhea, flu-like symptoms and nausea. This drug also may cause low blood pressure, blurred vision and changes in color vision, and abnormal ejaculation. This medication has been linked to prolonged erections or priapism. Use of this drug, most often in patients with pre-existing heart disease, has been related to chest pain, heart attacks, death, strokes, palpitations and increased heart rate; however, it is not clear whether these side effects are due to cheap Forzest, concurrent use of nitrates, or the sexual activity itself. Rare cases of sudden loss of hearing have been reported with phosphodiesterase inhibitors, sometimes including ringing in the ears and dizziness.