Dosing The dose of this medicine will be different for different patients. If this happens, it can put you at serious risk of adverse side effects. Do not press on the plunger of the syringe. Therefore, you can feel safe knowing that the medications you are buying are from reputable wholesalers and genuine. Moderation is very important. It continues to work for up to 4 hours, although its action is usually less after 2 hours. Very few, if any, benefits are present.AdSay Goodbye to Performance Anxiety and Hello to Improved Sexual Stamina! Trust Our Unbiased Reviews and Improve Your Sexual Health in Confidence!Honest & Unbiased Reviews · Over 20 Years Online · Over Products Tested. AdWe stock a wide variety of off grid & grid tie solar equipment from controllers to panels. Shop Northern Arizona Wind & Sun for Low Prices, Expert Knowledge & Great Customer ServiceKnowledgeable Staff · 35 Years Running · Quick & Easy Checkout.