Advancis Pharmaceutical Corporation (NDAQ:AVNC) has been a rollercoaster ride for investors since it IPO'd back in 2003 at $9/share. Since then it has plummeted to under $1 before recently rebounding to over $4. What's causing this volatility? Well, the company is focused on the development of a new drug delivery system for antibiotics, known as PULSYS. This system essentially releases "bursts" of antibiotics over time instead of releasing it all at once. The theory was that this method would not only fight infections more effectively, but also reduce the risk of long-term immunity to antibiotics.

The company ran into trouble, however, when their clinical trials failed in mid-2004. The tests performed at the time concluded that the differences between PULSYS and normal drug delivery methods were not statistically significant. This news devastated investors as the stock sank from $8 to $3. Luckily, the company had acquired the rights to sell Keflex along with a $12m credit facility, which allowed them to stay afloat while they re-applied for approval. Recently on August 10th, the company redeemed themselves when it's Phase III trials of Amoxicillin PULSYS achieved its endpoints (showed statistical significance), and the stock reached a new 52-wk high. In a press release, the CEO said:

"'The positive outcome of this trial provides proof-of-concept that PULSYS antibiotic dosing is effective in eradicating streptococcal bacteria in humans,' stated Edward Rudnic, president and CEO of Advancis. 'If approved for marketing, we believe our once-daily version of amoxicillin would represent a major advance in the most widely used antibiotic in the U.S. and would be the first and only once-daily amoxicillin therapy approved for marketing in the United States.'"

This proof-of-concept has apparently attracted new investors. A 13G filing with the SEC on August 17th revealed a 17% ownership stake by Deerfield Capital Management through a hedge fund that invests in special opportunities. Note that this was bought through five different vehicals, so the reporting was not required until at least one of them reached 5%.

Although the company's recent 10Q was lackluster, these recent developments finally help prove that Advancis' technology does work. If it continues this success, it may be able to revolutionize the antibiotics market - a $27b market - through its more efficient drug delivery system. The company definitely has a long way to go, but it's a great stock to put on the radar.