What are the best medicines for kids with adhd?

Depends. The answer is complex, with the age of the child playing a role. There are stimulant medicines (ritalin, etc) and non-stimulant medicines (strattera (atomoxetine), intuniv). For kids who are hyperactive and don't focus, the stimulant class can be very effective. If the child has focus problems and has some minor anxiety, strattera (atomoxetine) is a good choice. Of course, discuss these options with your physician.
Individual responses. Finding the right medication & dose for each child with adhd is a process that requires good communication among parents, teacher & doctor. The stimulants methylphenidate & amphetamine come in many delivery systems with different onsets, peaks & durations of action & and work ~80-90% of the time within a few days. Non-stimulants work ~65% of the time, 'round-the-clock, after ~ 4-6 weeks.
VYVANCE. One a day--long acting--comes in different doses.
Several. There are many more choices these days. Generally a stimulant is the primary choice. ADHD brains often calm on them rather than speed up. Key Is to review the behaviors and determine which ones are negatively affecting the child's life. There are a few non- stimulants available but often take a longer time to take effect. It is not unusual for several medicines to be tried until one fits the needs.
No one best. There is no one best medication. Among the most common are stimulants such as methylphenidate (Ritalin, Concerta) and amphetamines (dexroamphetamine-dexedrine, Adderall and Vyvanse). Other medications that can be helpful include Strattera, Provigil, Nuvigil, Wellbutrin (bupropion) and Imipramine.
Nutrition. Adhd meds have many side effects. Diet and nutrition and supplements like fish oil will help. If it is decided to use meds, many variables like whether problem is hyperactivity or inattentio or both, length of time during day controls are needed, other medical problems. This should be discussed with your doctor who will review the available meds and what would be appropriate.
Nutrition, no TV, Most of the dx. Of 'adhd' is because child needs your attention, if not provided does things to get your attention. R/o underlying neuro conditions, , good nutrition, no tv video games, out door activities with family, smll structured activities during homework time, and make sure child has your full attention when he/she is talking.