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.
If you go to school full time (at least 15 credits per semester), you can complete your degree in two years. However, the average amount of time it takes to complete an associates degree in the U.S. attending school part time is six years. Though associate's degree are two-year programs, it will take longer if basic skills courses are needed.