Hi ....I have a prescription for Hydrocodone Bitar (take a teaspoon amount before bedtime), after the 2nd usage noticed a slight numbness in my left hand and my left foot felt cold.......after the 3rd usage experience the same symptoms plus at times hot sweaty feet. I m assuming that this is due from taking the hydrocodone which was prescribed to deal with a constant dry cough and chest pain... the cough is mostly gone now . My question(s) are can the drug hydrocodone cause the above effects ......how serious are they and how long after I stop taking the drug will symptoms take to subside......as stated I have only taken the drug (3) times at (5 millilitres) per.........thanks...............Stephen.