Medication info
YS Alpha Tablet 1 Microgram (Alfacalcidol)

YS Alpha Tablet 1 Microgram (Alfacalcidol)

OTC medicationTablet경구
Ingredient · strength
Alfacalcidol›0.001mg / 1 tablet
Manufacturer / importer
(주)와이에스생명과학
Appearance
White round tablet
Packaging
Bottle - 30 tablets/bottle, Bottle - 100 tablets/bottle
Approval status
Active

MFDS item code 202502884 · Approved 2025.11.07

Summary

Main use
Symptoms of vitamin D metabolism disorders (hypocalcemia, bone pain, etc.) and improvement of osteoporosis
Who takes it
Adults · Children
Adult dose
Chronic kidney failure/Osteoporosis: 0.5 to 1 µg orally once daily as alfacalcidol. Hypoparathyroidism and other diseases related to vitamin D metabolism disorders: 1 to 4 µg orally once daily as this medication.
Child dose
Osteoporosis: 0.01 to 0.03 µg per kg body weight orally once daily as alfacalcidol. Other conditions: 0.05 to 0.1 µg per kg body weight orally once daily as this medication.

Ingredients

Manufacturer
(주)와이에스생명과학

Efficacy & effects

Symptoms of vitamin D metabolism disorders (hypocalcemia, bone pain, etc.) and improvement of osteoporosis

  • Hypocalcemia
  • tetany
  • bone pain
  • bone lesions
View approved original text

This medication improves hypocalcemia, muscle spasms (tetany), bone pain, and lesions caused by vitamin D metabolism disorders occurring in chronic kidney failure, hypoparathyroidism, vitamin D resistant rickets, or osteomalacia. It is also used in the treatment of osteoporosis to help enhance bone health. This medication corrects vitamin D metabolism disorders, alleviates related symptoms, strengthens bones and improves the quality of life for patients.

How to take

Adult dose

Chronic kidney failure/Osteoporosis: 0.5 to 1 µg orally once daily as alfacalcidol. Hypoparathyroidism and other diseases related to vitamin D metabolism disorders: 1 to 4 µg orally once daily as this medication.

Child dose

Osteoporosis: 0.01 to 0.03 µg per kg body weight orally once daily as alfacalcidol. Other conditions: 0.05 to 0.1 µg per kg body weight orally once daily as this medication.

Precautions

This medication should not be taken by patients with hypercalcemia, hyperphosphatemia, or hypermagnesemia, where the levels of calcium and phosphorus in the blood are abnormally high. Patients with blood calcium and phosphorus product exceeding specific levels or those with metabolic alkalosis, which causes the blood to become alkaline, should not take this medication. Patients showing signs of vitamin D toxicity or those allergic to any components in this medication should avoid using it. During the course of this medication, magnesium-containing drugs, vitamin D and its derivatives, calcium-containing preparations, or certain diuretics, which may increase the risk of hypercalcemia, should not be taken together. Breastfeeding women should avoid using this medication due to uncertainty regarding its safety, and if necessary, discontinuing breastfeeding is advisable. Women who are pregnant or may become pregnant should consult a physician, as it may be harmful to the fetus. Children, elderly patients, those on specific medications, patients with a history of kidney stones, or sarcoidosis should consult a healthcare professional before using this medication. During the use of this medication, gastrointestinal disturbances, neurological or psychiatric issues, heart problems, renal function decline, liver function abnormalities, skin rashes, visual disturbances, etc. may occur. If any abnormal symptoms appear, discontinue use immediately and consult a professional. Excessive dosage may lead to severe hypercalcemia, therefore, serum calcium levels should be regularly monitored, and the dosage adjusted accordingly. Strict dietary management and calcium intake are necessary to prevent symptoms of hypercalcemia and prompt action should be taken in case of any abnormal symptoms.

Side effects and when to seek care immediately

Serious side effects

Hives, severe swelling (edema), chest tightness, difficulty breathing, cold sweat, pallor, severe allergic reactions, high fever with severe rash, blisters, peeling skin, painful mucous membranes of the mouth/eyes, severe skin reactions, shortness of breath or difficulty breathing, asthma attacks, respiratory issues accompanied by cough and fever, yellowing of the skin or eyes (jaundice), extreme lethargy, liver issues (jaundice), sudden

Mild side effects

  • Loss of appetite
  • nausea
  • vomiting
  • diarrhea
  • constipation
  • stomach pain
  • discomfort in the upper abdomen
  • bloating
  • indigestion
  • thirst
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  • oral discomfort
  • polydipsia
  • pancreatitis
  • metallic taste
  • muscle tightness in legs
  • headache
  • heaviness in the head
  • insomnia
  • anxiety
  • weakness
  • fatigue
  • dizziness
  • tingling
  • drowsiness
  • heartburn
  • shoulder stiffness
  • presbycusis
  • tinnitus
  • memory and cognitive decline
  • psychiatric symptoms
  • altered consciousness
  • back pain
  • mild increase in blood pressure
  • palpitations

Not everyone experiences these, and they can vary from person to person.

Storage

This medicine may be sensitive to air and moisture, so it should be stored in a tightly sealed container. It is advisable to keep it at room temperature between 1°C to 30°C. This will help maintain the efficacy of the medication for a longer period.

Appearance and packaging

Appearance

White round tablet

Package unit

Bottle - 30 tablets/bottle, Bottle - 100 tablets/bottle

Same-ingredient medicines

Even with the same ingredient, strength, dosage form and how it is taken can differ.

Even with the same ingredient, the dose and directions can differ by strength and dosage form. Talk to a doctor or pharmacist before switching from a medication you are already taking.

Questions about this medicine

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For anything that needs medical judgment, consult a doctor or pharmacist.

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This drug information is based on data provided by the Korea Ministry of Food and Drug Safety.
Consult a doctor or pharmacist for accurate dosage, administration, and usage instructions.