An inherited eye disease that affects the retina. Its effects might last longer if you have mild to moderate ED. This medication is taken with or without food an hour before sex. You may have your doctor’s office directly submit the script to your preferred pharmacy, or you can take it with you and use the script to purchase Viagra at a pharmacy or online. If you have health insurance, confirm your coverage online or with a customer service representative. To make the most out of your doctor’s appointment, you should prepare questions and answers ahead of time.“I think I might have ED. What can I do about it? ” Take the first step and talk to your doctor Important Safety Information and Indication Do not take VIAGRA if you: • take any . For more on diagnosing and treating ED, read What to do About Erectile Dysfunction, a Special Health Report from Harvard Medical School. If you’ve been having difficulty getting or sustaining erections, talk about it with your doctor. You can take the drug 30 minutes to 4 hours before you anticipate sexual activity. Based on how well you respond to this dosage and any side effects you have, your .