Do not use this product if you have hypercalcemia or hypercalciuria. Consult your healthcare practitioner prior to use if you are pregnant or breastfeeding, have kidney disorders, or if you take other vitamin D supplements, multivitamin supplements containing vitamin D, or products containing vitamin D analogues, or any prescription medications including antacids,anticonvulsants, digoxin,cholestyramine,colestipol, mineral oil,steroids,statins or thiazide diuretics.15-20 mcg (600-800 IU) of vitamin D per day isadequatefor most individuals. Consult your healthcare practitioner to determine if you would benet from additional vitamin D before taking this product. Stop use and consult your healthcare practitioner if weakness, fatigue, drowsiness, headache, lack ofappetite, dry mouth, metallictaste, nausea,vomiting, vertigo, ringing in the ears, lack of coordination and muscle weakness occur which are early symptoms of hypercalcemia or if you haveany othersideeects.