This is copied from
http://www.miraclemineral.org/importantinfo.php#q2.
It is from the inventor of the protocol, Jim Humble.

Note: When following the instructions below, keep this paragraph in mind. Always activate the MMS drops with one of the food acids, either lemon juice drops, or lime juice drops, or citric acid solution drops (to make citric acid solution add 1 level tablespoon of citric acid and 9 tablespoons of water. Store it in a bottle with a lid.) Always use 5 drops of one of these food acids to each one drop of MMS, mix in a empty dry glass and wait at least 3 minutes, then add 1/3 to 2/3 glass of water or juice and drink. (You can expand the 3 minutes out to 10 minutes, and after adding the juice or water you can wait up to an hour before drinking.)

1. All protocol for taking MMS in the Americas starts with one or two drops. Never start with more than one or two drops. People who are very sick and/or sensitive should start with ½ drop. Activate the drops as given above.

2. If you do OK and do not notice nausea on the first dose, increase by one drop for the second dose. If you notice nausea reduce the amount of MMS for the next dose. Do two doses a day, one in the morning and one in the evening. Continue to increase by one drop each time you take a new dose. When you notice nausea, reduce the dose by one drop, or bad diarrhea reduce by 2 or 3 drops. Usually reduce for one or two times before going back the amount that it took to make you nauseous.

Note: If you notice diarrhea, or even vomiting that is not a bad sign. The body is simply throwing off poisons and cleaning itself out. Everyone says that they feel much better after the diarrhea. You do not have to take any medicine for the diarrhea. It will go away as fast as it came. It will not last. It is not real diarrhea as the body is just cleaning out, and it is not caused by bacteria or virus. When the poison is gone, the diarrhea is gone.

3. Continue to follow the procedure given in 2 above. Until you reach 15 drops twice a day without nausea. At that point increase to 3 times a day. Stay at 3 times a day for at least one week and then reduce the drops to 4 to 6 drops a day for older people and 4 to 6 drops twice a week for younger people.
Note: Once you have completed step 3 above most of the viral, bacteria, mold, and yeast load will be gone from your body. Your body will be clean. You no longer have to worry about feeding the microorganism load. You can base you diet on nutrition, rather than not feeding the load. The diabetes will be gone, thus you no longer need to worry about sugar. You won't have to worry about the pancreas over reacting thus giving you a shock of insulin. Instead it will give you just enough insulin to knock the blood sugar lever to the right level (You won't feel sleepy after eating a candy bar). Your body will then be able to easily adsorb vitamins and minerals and many other nutrients it might have been missing up to this time. You should feel better as time goes by. Do not quit taking the MMS.

For Children: The protocol for children is essentially the same. One should usually start at 1/2 drop. Just make a one drop drink and pour out 1/2 of the drink before giving it to the child. Then increase from 1 to 2 to 3 drops as given above, but do not go beyond 3 drops for each 25 pounds (11.4 kg) of body weight. With a baby start with 1/2 drop and increase to one drop up to 2 drops, but no more. So if you give 1/2 drop in the morning wait until the afternoon before giving 1 drop and then the next morning for 2 drops. It the baby or child should become nauseous wait an extra hour or two before giving another dose and also give a smaller dose. Give smaller doses until the baby or child can tolerate more, but do not stop giving doses.