Men with impotence can get treatment with kamagra vs Viagra Tablet. This medication should be taken by men 30 minutes before sexual activity. This medication takes five hours to take effect. sildenafil, an ingredient in this medication, aids in boosting blood flow to a man’s penile tissues. Consume this medication with water; do not crush or chew the tablet. This medication has side effects as well, so follow your doctor’s advice when taking it.