"this medicine increased my mood within a matter of days. however, when i increased my dosage from 10 mg to 20 mg in the start pack, i got violently sick, nausea then extreme vomiting with a headache. worse than any hangover that i have ever had. the problems lasted for 2 days and eventually diminished to a headache. when i started taking the medication i notice that a numbness in my arms and shoulders at night and stiff joints in the morning. when i stopped the medicine the muscle stiffness and joints decreased. i was on the medicine for almost a month and still have the stiff joints and muscle aches.  i was an endurance athlete and this type of pain was different."