Be careful. Alcohol and Accutane both being metabolized through the liver can increase the potential for damage to the liver. In addition, Accutane increases significantly the risk for sunburn. Using a sunscreen of at least an SPF 30 and reaaplying every 1.5 to two hours is extremely important.
IPL gives good but not great results when used in the appropriate setting. I agree the diode is much more effective in your situation.