Is there scientific proof that adhd drugs are not addictive nor dangerous in the long run for those who need it? if so where can i find this evidence?

No: The older drugs are derivitives of anfetamine . The new ones Kapvay and Intuniv are not addictive.

Not usually: Its difficult to say this because there's circumstances when these they can be both. However when used properly under medical supervision they are relatively safe. Stimulants have been extensively researched for almost 40 years with longitudinal studies and show almost no detrimental effects. Look at psychiatric journals.

Literature : See my health files for references, particularly biederman and faraone's work from harvard. They have the longest running prospective study on adhd. Many articles have been published about the safety of stimulant medications. See http://www.Nimh.Nih.Gov/health/publications/attention-deficit-hyperactivity-disorder/complete-index.Shtml and chadd.Org.