The free version of "Epocrates" is available both on-line or for download on mobile devices. To access it, click on the icon that says 'My Account' (towards the top right) and then register or login. It will give you access to interaction databases, drug monographs, and quick clinical guides, including many natural supplements, all for free. There might be other similar programs so if you know of another useful program please share it with us.

Click http://www.epocrates.com/ link to open resource.