This often depends on how many parasites are infecting you, and what kind you have.
Some people experience a really huge die off by taking a small amount of dewormer. Others barely notice anything at all. To be safe, start with a dose that is smaller amount than the recommended amount, and slowly increase until you get the desired results. Don't be afraid to take more than is recommended. Recommended doses are averages. Some people need more. Some people need less.