Try bookmarking and using www.drugs.com
They have profiles for almost all the drugs on the market. You can search for drugs alphabetically by generic or brand name, or by medical conditions and diseases if you need lists of medications used in certain diseases. They also have information on each drug separated into patient information and professional information. A lot of the information for professionals is the same as what is in the PDR. They will also provide links to other internet sources about some of the drugs. Some drug companies have websites set up for specific drugs in order to provide consumer information to patients that use them, particularly if the drug is a top seller or newly released and being advertised heavily. As an example, when I was looking for information a few years ago on Tamiflu when it was first released to the public, I ran across the phamaceutical company's website on it. Learned all about the signs and symptoms of the flu and what Tamiflu did. I was writing a care plan for a nursing home I was working in at the time and got a lot of information off that site. Also, there's a lot on diabetes at the Insulin manufacture's sites. Use www.drugstore.com/pharmacy/drugchecker
for information on interactions between medications.