A drug called purple viagra is used to treat erectile dysfunction and early ejaculation. For male impotence, this medication is incredibly effective. This medication is only for use by men who are eighteen years of age or older. One of the drug's ingredients, sildenafil, helps increase blood flow to a man's penile tissues. This medicine may only be used by men who are at least 18 years old. Take this medication 30 minutes before engaging in any sexual activity. You can take this medication with or without food. Do not chew or crush the tablet; instead, take it with water. It takes four to six hours for this medication to start working. Adhere to your doctor's instructions when using this medication.