156 TOBACCO — TOLU BALSAM — TONGA. 



TOBACCO. Nicotiana Tabacum. 



Synonym — Leaf Tobacco, Tobacco leaf, Tabacca. 



Part used — Leaves. 



Action — Narcotic, sedative, emetic. In the employ- 

 ment of Tobacco as a medicinal agent much care should 

 be exercised, as it produces great depression, emesis, 

 and convulsions, sometimes by very moderate doses. 

 Internally it is for this reason seldom used. As an 

 ointment, made by simmering the leaves in lard, it has 

 been employed in curing old ulcers and painful tumours. 

 The leaves were official in B.P. 1885. 



TOLU BALSAM. Myroxylon Toluifera. 



Synonym — Balsam Tolu. 



Part used — Balsam. 



Action — Stimulant, tonic, expectorant. Used in 

 chronic catarrhs, pulmonary and bronchial affections, 

 coughs, &c. 



Preparations — Tincture B.P. : Dose, £-1 drachm. 

 Syrup B.P. : Dose, ^-1 drachm. 



TONGA. Rhaphidiphora vitiensls. 



Synonym — Premna taitensis. 



Part used — Leaves, bark. 



Action — Antineuralgic. Has been recommended and 

 successfully used in various forms of neuralgia. The 

 dose is £-1 drachm of the powder, or fluid extract. 



TONKA- BEANS. Dlpteryx odorata. 



Synonym — Coumarouna odorata. 



Part used — Seeds. 



Action — Aromatic, narcotic, cardiac tonic. Although 

 this drug has been used in whooping cough, it seems to 

 have fallen into disuse, probably owing to its heart- 

 paralyzing effects in large doses. It contains an odorous 

 principle, Coumarin, which is largely used as a flavour- 

 ing and perfume. 



