Title:  Doxylamine
CAS Registry Number:  469-21-6
CAS Name:  N,N-Dimethyl-2-[1-phenyl-1-(2-pyridinyl)ethoxy]ethanamine
Synonyms:  2-[a-(2-dimethylaminoethoxy)-a-methylbenzyl]pyridine;  phenyl-2-pyridylmethyl-b-
N,N-dimethylaminoethyl ether;  2-dimethylaminoethoxyphenylmethyl-2-picoline
Molecular Formula:  C17H22N2O
Molecular Weight:  270.37
Percent Composition:  C 75.52%, H 8.20%, N 10.36%, O 5.92%
Literature References:  Prepn:  C. H. Tilford 
et al., J. Am. Chem. Soc. 70, 4001 (1948); N. Sperber 
et al., ibid. 71, 887 (1949).  Pharmacology:  B. B. Brown, H. Werner, 
J. Lab. Clin. Med. 33, 325 (1948).  GC determn:  H. C. Thompson 
et al., J. Chromatogr. Sci. 20, 373 (1982).  Chronic toxicity study:  C. D. Jackson, B. Blackwell, 
J. Am. Coll. Toxicol. 12, 1 (1993).  Review of properties and pharmacology:  T. J. Haley, 
Dangerous Prop. Ind. Mater. Rep. 2, 17-20 (1982).  Clinical evaluation as hypnotic:  F. Sj?qvist, L. Lasagna, 
Clin. Pharmacol. Ther. 8, 48 (1967); as antihistaminic for use in colds:  R. Eccles 
et al., J. Pharm. Pharmacol. 47, 990 (1995).
Properties:  Liquid, bp0.5 137-141°.  Sol in acids.  Slightly volatile, darkens on exposure to light.
Boiling point:  bp0.5 137-141°
 
Derivative Type:  Succinate 
CAS Registry Number:  562-10-7
Trademarks:  Gittalun (Boehringer, Ing.);  Hoggar (Stada);  Mereprine (Cassella-med);  Sedaplus (Rosen Pharma);  Unisom (Pfizer)
Molecular Formula:  C17H22N2O.C4H6O4
Molecular Weight:  388.46
Percent Composition:  C 64.93%, H 7.27%, N 7.21%, O 20.59%
Properties:  Crystals, mp 100-104°, sol in water.  One gram dissolves in 1 ml water, 2 ml alcohol, 2 ml chloroform.  Slightly sol in benzene and ether.  pH (1% aq soln):  4.9 to 5.1.  LD50 in mice, rabbits (mg/kg):  470, 250 orally; 62, 49 i.v.; in mice, male rats, female rats (mg/kg):  460, 440, 445 s.c. (Brown, Werner).
Melting point:  mp 100-104°
Toxicity data:  LD50 in mice, rabbits (mg/kg):  470, 250 orally; 62, 49 i.v.; in mice, male rats, female rats (mg/kg):  460, 440, 445 s.c. (Brown, Werner)
 
Derivative Type:  Combination with pyridoxine hydrochloride 
Trademarks:  Bendectin (Duchesnay);  Diclectin (Duchesnay)
Literature References:  Has been used for nausea of pregnancy.  Some formulations also contained dicyclomine, 
q.v.  Review of therapeutic use and the issue of teratogenicity:  L. J. Sheffield, R. Batagol, 
Med. J. Aust. 143, 143-147 (1985); R. L. Brent, 
Reprod. Toxicol. 9, 337-349 (1995).
 
Therap-Cat:  Antihistaminic; sedative, hypnotic.
Therap-Cat-Vet:  Antihistaminic.
Keywords:  Antihistaminic; Aminoalkylethers; Sedative/Hypnotic.