| Exclusion Criteria: | 1) Subject is greater than 12 months out from completion of radiation therapy
2) Subject is pregnant or nursing
3) Subject had previous cancer of the head and/or neck and is being treated with a second course of radiation therapy
4) Subject has a history of an autoimmune disease with pretreatment xerostomia (i.e. Sjogren's) or other underlying systemic illness known to cause xerostomia independent of prior radiation therapy exposure
5) Subject has had resection of both parotid glands
6) Subject has history of cardiomyopathy or untreated moderate to severe CAD
7) Subject has known cardiac arrhythmias
8) Subject has grade 3 xerostomia (CTC v. 3) or no demonstratable salivary flow after the test done by visual inspection
9) Subject has history of significant renal or hepatic impairment
10) Subject uses gastrostomy tube for nutrition supplementation
11) Subject is taking medications specified in Appendix C
12) Subject is taking or has taken any investigational new drug within the last 30 days or is planning to take such a drug during the course of this study
13) Subject has a contraindication to administration of muscarinic medications
14) Subject has been treated previously with a muscarinic agent for xerostomia (i.e. Pilocarpine HCL)
15) Acute iritis, or narrow angle (angle closure) glaucoma at present or at any time in the past.
16) History of uncontrolled cardiovascular disease in a subject who may be unable to compensate for transient changes in hemodynamics or rhythm induced by cholinergic agents.
17) History of significant pulmonary disease (i.e. COPD, emphysema, asthma, chronic bronchitis). |