The dose varies from 10-40 mg per dose. Usual starting dose is 2 tsp twice a day , adjusting as necessary. Fiber-type medications are not as useful in the younger children, but can be tried. Examples are Maltsupex, Citrocel, Metamucil, or Fiberall. Glycerin suppository can be tried, but is less effective in older children than in infants.
Dulcolax suppositories are too strong for younger children.
Laxatives such as Ex-Lax are not appropriate for children. Don't try to rush them because you have something else to do or some place to go. Encourage the child to feel comfortable using a toilet outside of the home. For example, if they get so many stickers in a row or week, they gain some greater reward for trying to use the bathroom. Fiber therapy - Try to use some sort of fiber therapy in the older children, such as Maltsupex, Citrocel, Metamucil, Fiberall, or Fibercon.