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 already have a bachelor's degree in nursing (BSN), you are in luck. The only step you need to take towards becoming a nurse practitioner is getting your MSN degree. This takes on average two to three years depending on if you complete your NP program on a part-time or full-time basis.