Just wait till the stock is halted. That is when the company receives the notice from the FDA. How long it takes for the company to release the news after the stock is halted is probably correlated with rejection. Long waiting time = high chance of CRL.
Don't get too concerned yet. VVUS didn't announce approval until early afternoon last week. If you don't hear anything by 3-4 pm then the CRL could have been received. They usually announce them after the market closes.