The Most Effective ADHD Medication For Adults
Most ADHD medications are classified into two categories: stimulants and nonstimulants. Stimulants like methylphenidate (Provigil) and amphetamines work by increasing the activity in areas of the brain that control the behavior and attention.

Non-stimulants, such as guanfacine Clonidine, atomoxetine, and others, perform slower than stimulants but they help improve concentration, attention, and impulsivity. They also seem to reduce anxiety, which is often comorbid ADHD in adults.
Stimulants
Stimulant medications are often the first choice of doctors for treating ADHD, but they don't work well for everyone and can trigger negative side effects for some people. Nonstimulant medicines take longer to take effect, but can improve inattention or impulsiveness in certain adults. ADHD is best treated by the combination of therapy and medication.
The use of medication is 70%-80% effective in treating ADHD in adults. The use of medications is only part of the treatment. Many people also find that lifestyle changes and training can help. It is essential to inform your doctor about any issues or side effects from the medication so that they can alter your dosage if necessary.
Amphétamines and methylphenidates are stimulant medicines. Methylphenidates are the most commonly used medication for ADD/ADHD. They are available in various strengths forms, dosages, and forms comprising chewable liquid, tablet, and capsule. They're generally regarded as safe for adults and children, however they shouldn't be taken by those suffering from arteriosclerosis that is advanced, glaucoma or with symptomatic heart disease or who have recently taken monoamine oxide inhibitors (MAOIs).
Amphetamines have a lot in common with methylphenidates, however they're more potent. They are less likely to cause major adverse effects and are more efficient in treating ADHD symptoms than methylphenidates. They're also more likely to lead to addiction and abuse, hence they're classified as Schedule I drugs.
Both kinds of stimulants can cause unpleasant adverse effects, such as stomach upsets, headaches insomnia and jitters. Most of these side effects are minor and last for a few weeks.
Nonstimulant medications
Nonstimulant medications for ADHD take longer to start working than stimulants and might not be as effective, but they can help improve attention and irritability. They function by increasing the levels of brain chemicals that aid in controlling emotions and help focus attention. There are many kinds of these medicines, and some doctors may prescribe them along with stimulants to maximize the benefits of both treatments.
Strattera (atomoxetine) is an SNRI which increases the levels of norepinephrine within the brain, which reduces the tendency to be impulsive and inattention. adhd medication names took a long time, but the drug has been proven to be effective in treating ADHD. Guanfacine (Intuniv) is a blood pressure medication that also works by increasing levels of norepinephrine and decreasing the impulsiveness. It takes a bit longer to begin working than amphetamines and methylphenidate and it has more of a "no-fly" effect on the brain. Other medications that increase norepinephrine levels include Zyban/Wellbutrin (bupropion) and Effexor (venlafaxine). The FDA has not yet approved these drugs to treat ADHD. However, they may help some people. Antidepressants can also be used to treat ADHD, as they can increase the levels of brain chemicals that impact the way we behave and mood.