Some Valparin side effects should be cause for concern, especially those which could be indicative of a liver failure. The following reactions could be such indicators: stomach pain, discolored urine, jaundice, nausea, loss of appetite, or clay-colored stools. In these cases the patient is advised to seek local medical attention as soon as possible. Professional help should also be contacted if the user exhibits any of the following Valparin side effects: excessive bleeding, pronounced bruising, skin blisters, troubles with vision, hallucinations, uncommon weakness, or an impairment of motor coordination. A user may also experience less serious Valparin side effects in the form of diarrhea, depression, changes in weight, swollen breasts, tremors, changes in the menstrual cycle, constipation, or drowsiness.