Read and follow these instructions carefully before you start using sildenafil and each time you get a refill of your medicine. Such patients must not apply any out-of-pocket expenses incurred using this Savings Offer toward any government insurance benefit out-of-pocket spending calculations, such as Medicare Part D true out-of-pocket TrOOP costs You are responsible for reporting use of this Savings Offer to any private insurer, health plan, or other third party who pays for or reimburses any part of the prescription filled using this Savings Offer, as may be required. If you see air bubbles in the syringe, repeat the steps. Rarely reported side effects include: an erection that will not go away priapism. It continues to work for up to 4 hours, although its action is usually less after 2 hours. The amount of medicine that you take depends on the strength of the medicine.AdSave Time & Money with Online Prescription for Viagra, Cialis, Sildenafil and Tadafil. Free & Private Online Consultant with Real Doctors. Reliable E.D. Meds Shipped DiscreetlyK+ visitors in the past monthReal Doctors · Personalized Plan · Free Shipping · Discreet Packaging.  · Proper Use Drug information provided by: Merative, Micromedex ® Use sildenafil exactly as directed by your doctor. Do not use more of it and do not use it more . SAVINGS Terms and conditions apply. take any medicines called nitrates, often prescribed for chest pain, or guanylate cyclase stimulators like Adempas (riociguat) for pulmonary .