Adderall is extremely addictive because it is derived from opiates, making it similar to morphine and heroin. ​ The greatest danger of Adderall is a potentially fatal overdose. Adderall depresses a person’s respiration and decreases their blood pressure. This can lead to seizures, comas or cardiac arrest (especially when ingesting, snorting, or injecting crushed tablets). Adderall is most dangerous and addictive when taken via methods that increase the drug’s euphoric effects, such as crushing pills and then snorting or injecting the powder or combining the pills with alcohol or other drugs.