methoxamine hydrochloride

Methoxamine hydrochloride is a noradrenergic α1 agonistsup>[1].

Signaling Pathways >> GPCR/G Protein >> Adrenergic Receptor

Research Areas >> Neurological Disease

Noradrenergic α1[1].

Methoxamine produces a dose-related increase in force development of the cat papillary muscle that was selectively blocked by alpha-adrenergic antagonists. This is suggestive evidence of the presence of alpha-adrenergic receptors in ventricular myocardium[1]. Methoxamine greatly enhances bistable behavior in the decerebrate. Methoxamine approximately doubles the amplitude of IPIC without changing its onset voltage, its offset voltage, or its persistence[2].

[1]. Rabinowitz B, et al. Positive inotropic effects of methoxamine: evidence for alpha-adrenergic receptors in ventricular myocardium. Am J Physiol. 1975 Sep;229(3):582-5.

[2]. Lee RH, et al. Enhancement of bistability in spinal motoneurons in vivo by the noradrenergic alpha1 agonist methoxamine. J Neurophysiol. 1999 May;81(5):2164-74.

MOLECULAR FORMULA :

C11-H17-N-O3.Cl-H

MOLECULAR WEIGHT :

247.75

WISWESSER LINE NOTATION :

ZY1&YQR BO1 EO1 &GH

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :

LDLo - Lowest published lethal dose

ROUTE OF EXPOSURE :

Oral

SPECIES OBSERVED :

Rodent - mouse

DOSE/DURATION :

135 mg/kg

TOXIC EFFECTS :

Details of toxic effects not reported other than lethal dose value

REFERENCE :

27ZIAQ "Drug Dosages in Laboratory Animals - A Handbook," Rev. ed., Barnes, C.D., and L.G. Eltherington, Berkeley, Univ. of California Press, 1973 Volume(issue)/page/year: -,160,1973

TYPE OF TEST :

LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :

Intraperitoneal

SPECIES OBSERVED :

Rodent - mouse

DOSE/DURATION :

92 mg/kg

TOXIC EFFECTS :

Sense Organs and Special Senses (Eye) - effect, not otherwise specified Behavioral - somnolence (general depressed activity) Gastrointestinal - changes in structure or function of salivary glands

REFERENCE :

JPETAB Journal of Pharmacology and Experimental Therapeutics. (Williams & Wilkins Co., 428 E. Preston St., Baltimore, MD 21202) V.1- 1909/10- Volume(issue)/page/year: 92,283,1948

TYPE OF TEST :

LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :

Intravenous

SPECIES OBSERVED :

Rodent - mouse

DOSE/DURATION :

5030 ug/kg

TOXIC EFFECTS :

Behavioral - convulsions or effect on seizure threshold Lungs, Thorax, or Respiration - dyspnea Lungs, Thorax, or Respiration - other changes

REFERENCE :

EJPHAZ European Journal of Pharmacology. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 1967- Volume(issue)/page/year: 9,289,1970 ** REPRODUCTIVE DATA **

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Implant

DOSE :

400 mg/kg

SEX/DURATION :

male 1 day(s) pre-mating

TOXIC EFFECTS :

Reproductive - Paternal Effects - spermatogenesis (incl. genetic material, sperm morphology, motility, and count) Reproductive - Fertility - male fertility index (e.g. # males impregnating females per # males exposed to fertile nonpregnant females) Reproductive - Fertility - litter size (e.g. # fetuses per litter; measured before birth)

REFERENCE :

JRPFA4 Journal of Reproduction and Fertility. (Biochemical Soc. Book Depot, POB 32, Commerce Way, Colchester, Essex CO2 8HP, UK) V.1- 1960- Volume(issue)/page/year: 58,19,1980

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Intratesticular

DOSE :

400 mg/kg

SEX/DURATION :

male 21 day(s) pre-mating

TOXIC EFFECTS :

Reproductive - Paternal Effects - spermatogenesis (incl. genetic material, sperm morphology, motility, and count) Reproductive - Fertility - male fertility index (e.g. # males impregnating females per # males exposed to fertile nonpregnant females) Reproductive - Fertility - litter size (e.g. # fetuses per litter; measured before birth)

REFERENCE :

JRPFA4 Journal of Reproduction and Fertility. (Biochemical Soc. Book Depot, POB 32, Commerce Way, Colchester, Essex CO2 8HP, UK) V.1- 1960- Volume(issue)/page/year: 58,19,1980 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - X5310 No. of Facilities: 23 (estimated) No. of Industries: 1 No. of Occupations: 3 No. of Employees: 988 (estimated) No. of Female Employees: 625 (estimated)