What Does This CT Scan For Abdomen Indicate?

Hi, I had an abdominal CT with contrast today. My aftercare instructions indicate not to smoke or use tobacco products. It doesn t say anything about alcohol or caffeine, although my research today tells me alcohol and caffeine should be avoided. Since I am a coffee drinker,and my procedure was this morning, I had three to four cups of coffee afterwards. Did not plan on drinking alcohol tonight but would like to have a cigar. Is there any reason to wait on that? How long should alcohol be avoided? Thank you!