As the parent of a child with ADHD, you may already be aware of certain times of day that are more difficult than others. If your child has begun taking a stimulant medication, you may notice fluctuations in her attention and behavioral control throughout the day as each dose of medication begins to take effect, works well, and then wears off. With stimulant medications, effects such as behavioral rebound (a short period of irritability or moodiness as the medication is wearing off in about 4, 8, or 12 hours) may lead to difficulties at around dinnertime or bedtime that had not generally occurred before. You can help your child adjust to these changes by observing how and when her emotions and behavior tend to fluctuate each day and arranging her schedule as much as possible to accommodate these ups and downs. If you know, for example, that she is usually somewhat unsettled and irritable for a half hour after her arrival home from school, schedule her homework for after that time. If her medication suppresses her appetite at certain times during the day, schedule meals to avoid these periods. Take special care to prepare her for transitions between activities because these are likely to be especially difficult times for her.