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Iobenguane (131I)



ATC (Anatomical Therapeutic Chemical Classification)


CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Categories

X-ray contrast media

Diagnostic agent

Therapeutic radiopharmaceutical

Chemical Names

Guanidine, [[3-(iodo-131I)phenyl]metyl]-

Sterile, bacterial endotoxin-free solution of 1-(3-[(¹³¹I])iodobenzylguanidine or its salts. (Ph. Eur.)

Foreign Names

  • Iobenguanum (131I) (Latin)
  • Iobenguan (131I) (German)
  • Iobenguane (131I) (French)
  • Iobenguano (131I) (Spanish)

Generic Names

  • 3-Iodobenzylguanidine (131I) (OS: JAN)
  • Iobenguane (131I) (OS: DCF)
  • Iobenguane I 131 (OS: USAN)
  • MIBG (IS)
  • UNII-Q461L7AK4R (IS)
  • Iobenguane[¹³¹] Injection for Diagnostic Use (PH: BP 1999)
  • Iobenguane[¹³¹] Injection for Therapeutic Use (PH: BP 1999)
  • Iobenguani (¹³¹I) solutio iniectabilis ad usum diagnosticum (PH: Ph. Eur. 3, Ph. Eur. 8)
  • Iobenguani (¹³¹I) solutio iniectabilis ad usum therapeuticum (PH: Ph. Eur. 3, Ph. Eur. 8)

Brand Names


DCFDénomination Commune Française
ISInofficial Synonym
JANJapanese Accepted Name
OSOfficial Synonym
PHPharmacopoeia Name
Ph. Eur.European Pharmacopoeia
Rec.INNRecommended International Nonproprietary Name (World Health Organization)
USANUnited States Adopted Name

Further information on drug naming conventions: International Nonproprietary Names.

Important Notice: The international database is in BETA release. This means it is still under development and may contain inaccuracies. It is not intended as a substitute for the expertise and judgement of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that the use of any medication in any country is safe, appropriate or effective for you. Consult with your healthcare professional before taking any medication.