1 Infants: Lethargy, weakness, poor feeding, constipation, poor head control, poor gag and sucking reflex.  Children and adults: Double vision, blurred vision, drooping eyelids, slurred speech, difficulty swallowing, dry mouth and muscle weakness.
After completing an ADN degree one can take the NCLEX-RN licensure exam in order to become a registered nurse. An associate's degree in nursing can take two years and at times also three years to compete.
Requirements. Education. The first step to becoming an RN is to earn an associate or bachelorâs degree in nursing from a state-approved training program. Associateâs degrees in nursing (ASNs) take two years to complete and are available through community colleges, career centers and hospital-based programs.