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Concerns. Having high blood calcium levels and taking multiple calcium or vitamin D supplements can result in hypercalcemia over time. High calcium levels can interfere with muscle contractions, hormone levels and brain functioning.Consult with your physician if you think you have taken too much calcium.alcium tablets can cause headaches if taken in excess. Photo Credit Thinkstock/Comstock/Getty Images. Even though vitamins are important to your health, multivitamins and vitamin supplements can cause side effects. Some supplements cause side effects in normal doses, and others cause side effects in excessive doses.
Normal values for calcium levels range from 8.5 to 10.2 mg/dl--a reading higher than 10.2mg/dl is considered hypercalcemia. Too much calcium in the body causes constipation, bone pain, fatigue, nausea, vomiting and abnormal heart rhythms. Taking calcium supplements together with this type of collagen tablet should be done with caution.