Keep in mind that all the meds that can be found in the drug stores abroad are not necessarily going to be available in Jamaica. I have gone to pick up prescriptions on .Store mixed oral liquid in the refrigerator. This will allow your doctor to see if the medicine is working properly and to decide if you should continue to take it. If you are a Mayo Clinic patient, this could include protected health information. If you prefer, you may contact the U. If you have an erection that lasts more than 4 hours, get medical help right away. · Viagra; Descriptions. Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. These medicines prevent an enzyme called phosphodiesterase type-5 from working too quickly. The penis is one of the areas where . on October 30, Aerobic exercise is nearly as effective at addressing erectile dysfunction (ED) as medications such as Viagra, and is safe and less expensive, . Keep in mind that all the meds that can be found in the drug stores abroad are not necessarily going to be available in Jamaica. I have gone to pick up prescriptions on .Sorry something went wrong with your subscription Please, try again in a couple of minutes Retry. Trimazosin Other Interactions Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Use protective measures and ask your doctor if you have any questions about this. If you prefer, you may contact the U. Sildenafil works on the PDE5 enzyme in the lungs to relax the blood vessels.