Adverse Drug Reaction Classification System

Pharmaceutical Information
Drug Name Methylnaltrexone
Drug ID BADD_D02462
Description Methylnaltrexone is a pheriphally-acting μ-opioid antagonist that acts on the gastrointestinal tract to decrease opioid-induced constipation without producing analgesic effects or withdrawal symptoms. It is also a weak CYP2D6 inhibitor. FDA approved in 2008.
Indications and Usage Treatment of opioids induced constipation in palliative patients that are inadequately responding to laxative therapy.
Marketing Status Not Available
ATC Code A06AH01
DrugBank ID DB06800
KEGG ID D06618
MeSH ID C032257
PubChem ID 5361918
TTD Drug ID D03YVO
NDC Product Code Not Available
Synonyms methylnaltrexone | quaternary ammonium naltrexone | (5alpha)-17-(cyclopropylmethyl)-3,14-dihydroxy-17-methyl-4,5-epoxymorphinan-17-ium-6-one | 17-(cyclopropylmethyl)-4,5-epoxy-3,14-dihydroxymorphinanium-6-one | morphinanium, 17-(cyclopropylmethyl)-4,5-epoxy-3,14-dihydroxy-17-methyl-6-oxo-, (5alpha)- | morphinan-17-ium-6-one, 17-(cyclopropylmethyl)-4,5-epoxy-3,14-dihydroxy-17-methyl-, (5alpha)- | naltrexone methylbromide | N-methylnaltrexone bromide | morphinan-17-ium-6-one, 17-(cyclopropylmethyl)-4,5-epoxy-3,14-dihydroxy-17-methyl-, bromide, (5alpha,17R)- | naltrexone MB | naltrexone methobromide | methylnaltrexone bromide | methyl-naltrexone hydrobromide | MRZ 2663BR | Relistor | MRZ-2663 | naltrexonium methiodide
Chemical Information
Molecular Formula C21H26NO4+
CAS Registry Number 83387-25-1
SMILES C[N+]1(CCC23C4C(=O)CCC2(C1CC5=C3C(=C(C=C5)O)O4)O)CC6CC6
Chemical Structure
ADR Related Proteins Induced by Drug
ADR Term Protein Name UniProt AC TTD Target ID PMID
Not AvailableNot AvailableNot AvailableNot AvailableNot Available
ADRs Induced by Drug
ADR Term ADReCS ID ADR Frequency (FAERS) ADR Severity Grade (FAERS) ADR Severity Grade (CTCAE)
Abdominal pain07.01.05.0020.004880%
Ascites09.01.05.003; 07.07.01.001; 02.05.04.0020.001220%
Constipation07.02.02.0010.003050%
Death08.04.01.0010.005251%
Diarrhoea07.02.01.0010.003050%
Dizziness24.06.02.007; 17.02.05.003; 02.01.02.0040.001220%
Drug withdrawal syndrome19.07.02.011; 08.06.02.0040.001220%Not Available
Flushing08.01.03.025; 24.03.01.002; 23.06.05.0030.001220%
Gastrointestinal perforation07.04.04.0010.000318%Not Available
Intestinal perforation07.04.06.0020.001220%Not Available
Large intestine perforation12.02.03.005; 07.04.06.0050.000477%
Muscle spasms15.05.03.0040.001220%
Nausea07.01.07.001--
Peritonitis11.01.07.007; 07.19.05.0040.001220%
Vomiting07.01.07.0030.001220%
Withdrawal syndrome19.07.02.005; 08.06.02.0120.002440%Not Available
Pneumoperitoneum07.07.01.0080.001220%Not Available
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