Cexigra - 100 (BL-Mono) is a prescription medication for men to treat erectile dysfunction (impotence) by increasing blood flow to the penis. It belongs to the PDE 5) inhibitors group and should be taken on an empty stomach or with a meal. It works best when sexually stimulated, but not if not having erectile dysfunction. Common side effects include flushing, headache, dizziness, blurred vision, muscle pain, stomach upset, and rash. It is not suitable for women and should not be used with other medicines, nitrates, severe heart or liver problems, recent strokes or heart attacks, or low blood pressure.