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Side Effects
by mouth as directed. Alfacalcidol is usually taken with food. Follow all directions on the product package.
If you have any questions, ask your doctor or pharmacist. Your dosage is based on your medical condition, amount of sun exposure, diet, age, and response to treatment. If you are using the liquid form of this medication, carefully measure the dose using a special measuring device/spoon.
If you are taking the rapidly-dissolving tablets, dry your hands before handling the medication. You do not need to take this medication with water. Certain medications (bile acid sequestrants such as cholestyramine/colestipol, mineral oil, orlistat) can decrease the absorption of vitamin D. Take your doses of these medications as far as possible from your doses of vitamin D (at least 2 hours apart, longer if possible).
It may be easiest to take vitamin D at bedtime if you are also taking these other medications. Ask your doctor or pharmacist how long you should wait between doses and for help finding a dosing schedule that will work with all your medications. To help you remember, take it at the same time each day if you are taking it once a day.
If you are taking this medication only once a week, remember to take it on the same day each week. It may help to mark your calendar with a reminder. Do not take other supplements/vitamins unless ordered by your doctor.
If you think you may have a serious medical problem, get medical help right awa.
1. Elevated Blood Levels
Hypervitaminosis D is defined as blood vitamin D levels over 100 ng/mL, while vitamin D intoxication is defined as serum levels over 150 ng/mL Most cases of vitamin D toxicity are caused by inappropriate supplement dosing and prescription errors.
For example, in a 2020 case report, a 73-year-old man developed vitamin D toxicity after taking 10,000 IU of vitamin D per day for many years Her vitamin D levels were discovered to be 265 ng/mL Note that 130,000 IU is over 30 times the generally recommended safe upper limit of 4,000 IU per day.
Even though toxicity is unlikely if you keep your daily intake levels below 10,000 IU per day and avoid excessively high intakes of vitamin D supplements, experts recommend that people with typical vitamin D levels do not exceed 4,000 IU of vitamin D per day Keep in mind that people who are low or deficient in vitamin D typically need to take much higher levels than the current Tolerable Upper Intake Level (UL) of 4,000 IU per day to reach and maintain optimal vitamin D levels. However, make sure to consult a healthcare professional on what dosage you should take.
This will help you avoid potential inappropriate or dangerous dosing.
Warnings
Some individuals who might need extra vitamin D include:
Older adults
Breastfed babies
People with darker skin
Obese individuals (or those who’ve had gastric bypass surgery)
People with conditions such as cystic fibrosis, Crohn’s disease, or liver disease
Vitamin D3 may be used with different supplements or medicines to treat or prevent other condition.
What Is Cholecalciferol?
Vitamin D helps your body absorb calcium.
Cholecalciferol may also be used for purposes not listed in this medication guide.