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Pharmaceutical Manufacturing Handbook: Production and

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632 NASAL DELIVERY OF PEPTIDE AND NONPEPTIDE DRUGS<br />

TABLE 4 Nose - to - Brain Delivery of Agents in Different Species<br />

Drug/Molecule<br />

Path Followed<br />

Humans<br />

Arginine - vasopressin<br />

— a<br />

Adrenocorticotrophin — a<br />

Cholecystokinin — a<br />

Diazepam<br />

— a<br />

Insulin<br />

— a<br />

technetium - 99m -<br />

diethylenetriaminepentacetic<br />

acid<br />

Direct from nose to brain<br />

Apomorphine<br />

Nasal cavity → CSF<br />

Melatonin/hydroxycobalamin Nasal cavity → CSF<br />

Melanocortin, vasopressin, <strong>and</strong><br />

insulin<br />

Nasal cavity → CSF<br />

Rats<br />

Zidovudine<br />

Nasal cavity → CSF, nasal cavity → systemic<br />

circulation<br />

Dextromethorphan HCl Direct from nose to brain<br />

Cephalexin<br />

Nasal cavity → CSF, nasal cavity → systemic<br />

circulation<br />

Sulfonamides<br />

Nasal cavity → CSF, nasal cavity → systemic<br />

circulation<br />

Dextran<br />

Nasal cavity → olfactory mucosa → CNS <strong>and</strong><br />

also nasal cavity → systemic circulation<br />

Dopamine<br />

Direct from nose to brain<br />

Cocaine<br />

Direct from nose to brain<br />

Dihydroergotamine<br />

Direct from nose to brain<br />

Insulin<br />

Direct from nose to brain<br />

Dopamine<br />

Nasal cavity → CSF<br />

Methotrexate<br />

Nasal cavity → CSF<br />

Nerve growth factor Direct from nose to brain via olfactory<br />

pathway<br />

WGA – HRP (wheat germ Direct from nose to brain via olfactory nerve<br />

agglutinin – horseradish<br />

peroxidase)<br />

<strong>and</strong> bulb<br />

Zolmitriptan<br />

Direct from nose to brain<br />

Leptin<br />

Direct from nose to brain<br />

Morphine Direct nose to brain via olfactory pathway<br />

Nimodipine Direct nose to brain via olfactory bulb <strong>and</strong><br />

nasal cavity → CSF<br />

Meptazinol hydrochloride Nasal cavity → CSF<br />

Estradiol<br />

Nasal cavity → CSF via olfactory neurons<br />

a Facilitated transport to brain based on functional evidence in humans.<br />

Reference<br />

158<br />

159<br />

160<br />

161<br />

158 , 162<br />

163<br />

164<br />

165<br />

166<br />

167<br />

168<br />

169<br />

170 , 171<br />

neuronal components comprising the odorant detectors. The olfactory region is<br />

mainly located on the nasal septum <strong>and</strong> partly on the superior <strong>and</strong> middle turbinates.<br />

It occupies only a small region in humans of about 10 cm 2 in the roof of the<br />

nasal cavity, as compared to around 150 cm 2 in dogs. The olfactory epithelium is a<br />

172<br />

173<br />

141<br />

174<br />

175<br />

173<br />

176<br />

177<br />

178<br />

179<br />

180<br />

181<br />

182<br />

183<br />

184

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