Low blood phosphate; Phosphate - low; Hyperparathyroidism - low phosphate
Hypophosphatemia is a low level of phosphorus in the blood.
The following may cause hypophosphatemia:
- Certain medicines, including insulin, acetazolamide, foscarnet, imatinib, pentamidine, and sorafenib
- Fanconi syndrome
- Too little vitamin D
- Overactive parathyroid gland (hyperparathyroidism)
Symptoms may include:
- Bone pain
- Muscle weakness
Exams and Tests
Your health care provider will examine you.
The following tests may be done:
- Kidney function tests
- Vitamin D blood test
Exam and testing may show:
Treatment depends on the cause. Phosphate can be given by mouth or through a vein (IV).
How well you do depends on what has caused the condition.
When to Contact a Medical Professional
Call your provider if you have muscle weakness or confusion.
Klemm KM, Klein MJ. Biochemical markers of bone metabolism. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 23rd ed. St Louis, MO: Elsevier; 2017:chap 15.
Yu ASL. Disorders of magnesium and phosphorous. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 119.