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Vitamin D Side Effects

Vitamin D is a known vitamin that is fat soluble. It is important because it aids in the calcium absorption of the body and it is vital in the maintenance of healthy bones. A deficiency of it can lead to weaker bones. However, high intake is also not good for one’s health. It can be consumed synthetically or natural via your diet. You can also get it via sun exposure. One can get it via supplements or medications which also have side effects like:

Soreness of the eyes

This is a non serous side effect that is associated with the intake of vitamin D. This will eventually end after the first few weeks. If it bothers you, you must consult your physician.


This is a typical common side effect especially when you are still starting with this kind of medication. It may occur continually or in severe form. This is a mild condition that eventually ends up by its own.

Fatigue and Lethargy

This occurs when one takes in too much of this drug. Some persons may use this symptom as a reason to end taking in of this drug.

Weight loss

Another common side effect is weight loss. This usually involves a loss of few pounds. When you are dealing with a rapid loss of weight, you must call your physician.

Excessive thirst

Excessive intake will lead to changes in the body fluid. It may lead you to experience increase thirst.

Muscular weakness

This medication can affect your muscular system. Normally, contractions of the muscles are being controlled by the change in the levels of calcium in your muscular fibers.


Experts advised that the allowable limit for adults is around 2000 IU and for children below 12 years old is 1000 IU. High intake of this medication can lead to the medical condition called Hypercalcemia or abnormally high levels of calcium in the blood. This can eventually lead to complications like chest pain, hypertension, stupor, lethargy and coma in the long run.

Vomiting and nausea

This is a common gastrointestinal effect associated with the consumption of this drug. Vomiting and nausea occurs which lead to a loss of appetite and eventually loss of weight.

Excessive urination

Excessive urination may be felt during the changes of fluid in the body. It comes hand in hand with excessive or increase thirsty feeling.


Pain is also linked to increase intake of this drug. It may become severe and not be able to ease it by resting one’s body. Pain in one’s joints, bones and muscular system may be reported.


As the level of calcium in the blood increases, confusion may be felt. It may lead to dementia, memory loss, coma and depression if not treated properly.

Kidney stones

Too much calcium in the body leads to kidney stone formation. This can eventually lead to pain in the extreme level in the back, pelvis or at the sides where anatomically kidneys are located. Pain is felt due to the fact that the stone lodges anywhere in the kidney and leads to the blocking of urine.

Abnormalities in the heart rhythm

Calcium is known to aid in the heart muscle contraction regulation. When a person has increase vitamin D, which goes hand and hand with calcium, it leads to the heart muscles to irregularly contract which results to the person having an abnormal rhythm of the heart.

Liver disease effects

Vitamin D is converted in the liver. When a person has liver disease, it may eventually lead to less activation of this essential vitamin leading to its deficiency which will create health problems like osteoporosis, osteomalacia and hepatic ostodystrophy.

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