Fist of all there are many free Prescription cards online, some are better than others and I have tried a few. The one I have found that seems to work the best for me, is shown in this tutorial. However you can easily find one by searching for "United States Rx card" in any search engine. If you live in a different country, then alter your query accordingly.
Step one, Visit Free Rx Card
to create your own prescription card. If the website prompts you for an access code, use "tb01" and you will be able to create your card. If this codes no longer works, then just "google" another one.