If doing shots, depending on the strength of the cayenne, perhaps 1/4 teaspoon to start. Mix it with some lemon juice or maple syrup, which ever is easier to get down. Also make sure you are drinking plenty of water each day. I personally use 90,000 HU cayenne. The stuff you buy in your local supermarket is only 30,000 HU. The cayenne is perhaps the most important element at it breaks the sludge loose and the lax tea and SWF (Salt-Water-Flush) eliminates it from your colon. Once comfortable with 1/4 tsp shot, move up to 1/2 tsp. Here's a link to where I and others buy our cayenne: http://www.frontiercoop.com/dspCmnPrd.php?p=p&cn=Cayenne&ct=spicesaz
Feel free to read my blog as well as others who have done the MC. It provides important insights to the ups and downs of cleansing.