According to the National Institutes of Health Office of Dietary Supplements, side effects from ingesting excess calcium in the form of dietary supplements or antacid tablets include hypercalcemia (an elevated calcium le... More »

Taking calcium can cause mild side effects including belching, gas, cramps and bloating. Calcium is usually safe when taken in proper amounts, according to WebMD. However, calcium in excess of 1300 milligrams can cause m... More » Health Medications & Vitamins Side Effects

Side effects of excess magnesium include irregular heartbeat, low blood pressure, confusion, slowed breathing, coma and death, states WebMD. Taking magnesium supplements of more than 350 milligrams per day increases the ... More » Health Nutrition & Diets Nutritional Amounts & Limits

A high level of calcium in the blood, or hypercalcemia, indicates underlying conditions, such as hyperparathyroidism; lung diseases and cancers; dehydration; side effects of medications, such as thiazide diuretics; and h... More »

A high level of calcium in the blood, a condition called hypercalcemia, causes nausea and vomiting, frequent urination, excessive thirst and constipation, notes Mayo Clinic. Bone pain, muscle weakness, confusion and fati... More »

The side effects of excessive vitamin D levels in children mirror overdose symptoms of adults, and include: kidney stones, nausea, constipation and confusion. Toxic levels of vitamin D in the bloodstream typically arise ... More » Health Medications & Vitamins Side Effects

Potential side effects of taking calcium and vitamin D include constipation, nausea, headache and irregular heartbeat, according to Some people may experience pain in the bones or muscles after taking calcium ... More » Health Medications & Vitamins