Reviewed on 9/20/2021

What Is Molybdenum and How Does It Work?

Molybdenum is a trace mineral used to treat molybdenum deficiency. Taking molybdenum can prevent deficiency. However, it is very uncommon to have molybdenum deficiency.

Molybdenum is available under the following different brand names: Molypen.

What Are the Dosages of Molybdenum?

Dosages of Molybdenum:

Adult and Pediatric Dosage Forms and Strengths

Injection solution

  • 25 mcg/mL

Dosage Considerations – Should be Given as Follows:

Recommended Daily Allowance (RDA)

  • Males or females: 45 mcg/day
  • Pregnancy: 50 mcg/day
  • Lactating: 50 mcg/day
  • Children under 6 months: 2 mcg/day
  • Children 6-12 months: 3 mcg/day
  • Children 1-3 years: 17 mcg/day
  • Children 3-8 years: 22 mcg/day
  • Children 8-13 years: 34 mcg/day
  • Children over 13 years: 43 mcg/day

Implementation in Patients Receiving Total Parenteral Nutrition (TPN)

Molybdenum Deficiency from Prolonged TPN Support


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What Are Side Effects Associated with Using Molybdenum?

Common side effects of molybdenum include:

  • Gout-like symptoms (high dose)

This document does not contain all possible side effects and others may occur. Check with your physician for additional information about side effects.

What Other Drugs Interact with Molybdenum?

If your doctor has directed you to use this medication, your doctor or pharmacist may already be aware of any possible drug interactions and may be monitoring you for them. Do not start, stop, or change the dosage of any medicine before checking with your doctor, health care provider, or pharmacist first.

  • Molybdenum has no known severe, serious, or moderate interactions with other drugs.
  • Mild Interactions of molybdenum include:

This information does not contain all possible interactions or adverse effects. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share this information with your doctor and pharmacist. Check with your health care professional or doctor for additional medical advice, or if you have health questions, concerns, or for more information about this medicine.

What Are Warnings and Precautions for Molybdenum?


  • This medication contains molybdenum. Do not take Molypen if you are allergic to molybdenum or any ingredients contained in this drug.
  • Keep out of reach of children. In case of overdose, get medical help or contact a Poison Control Center immediately.


  • Copper deficient patients
  • Undiluted injection into a peripheral vein (risk of infusion phlebitis)

Effects of Drug Abuse

  • None

Short-Term Effects

  • See "What Are Side Effects Associated with Using Molybdenum?"

Long-Term Effects

  • See "What Are Side Effects Associated with Using Molybdenum?"


  • None

Pregnancy and Lactation

  • Use molybdenum with caution during pregnancy if benefits outweigh risks
  • Animal studies show risk and human studies are not available or neither animal nor human studies were done
  • Molybdenum is detected in milk; use caution if breastfeeding
Medscape. Molybdenum.
WebMD. Molybdenum.

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