The objective of this study is to compare the absorption of a niacin metabolite (1-methylnicotinamide, 1-MNA) from TRIA-662 (1-methylnicotinamide chloride)relative to the production of 1-MNA from Niaspan. The 1-MNA information obtained from this study will be used to adjust the top dose of a planned TRIA-622 efficacy study.

Main Inclusion Criteria

1. Healthy, non-smoking (for at least 6 months prior to drug administration), male and female volunteers, 35-65 years of age, inclusive.
2. Body weight within 30% of ideal body weight.
3. Healthy, according to the medical history, ECG, vital signs, laboratory results and physical examination as determined by the Principal Investigator/Sub-Investigator.
4. Systolic blood pressure between 100-140 mmHg, inclusive, and diastolic blood pressure between 60-90 mmHg, inclusive, and heart rate between 50-100 bpm, inclusive, unless deemed otherwise by the Principal Investigator/Sub-Investigator.

Main Exclusion Criteria

1. Known history or presence of any clinically significant hepatic (e.g. active liver disease, hepatic necrosis, jaundice, hepatobiliary disease, hepatic dysfunction), renal/genitourinary (e.g. renal impairment, renal dysfunction), gastrointestinal, cardiovascular (e.g. angina, myocardial infarction), cerebrovascular, pulmonary, endocrine (e.g. diabetes, hypophosphatemia,), immunological, musculoskeletal (e.g. rhabdomyolysis, myopathy), neurological, psychiatric, dermatological or hematological or condition unless determined as not clinically significant by the Principal Investigator/Sub-Investigator.

2. Clinically significant history or presence of any clinically significant gastrointestinal pathology (e.g. chronic diarrhea, inflammatory bowel disease), unresolved gastrointestinal symptoms (e.g. diarrhea, vomiting), or other conditions known to interfere with the absorption, distribution, metabolism or excretion of the drug experienced within 7 days prior to first drug administration, as determined by the Principal Investigator/Sub-Investigator.

3. Known presence of active bleeding.

4. Known history or presence of:

   • Alcohol abuse or dependence within one year prior to drug administration.
   • Drug abuse or dependence.
   • Hypersensitivity or idiosyncratic reaction to niacin, its excipients (e.g. methyl cellulose, povidone, stearic acid), and/or related substances (e.g. nicotinamide [Vit. B3]).
   • Hypertension requiring treatment
   • Active peptic ulcer
   • Hypo or hyperthyroidism not treated or not stable for at least 6 months
   • Gout
   • Food allergies and/or presence of any dietary restrictions.
   • Severe allergic reactions (e.g. anaphylactic reactions, angioedema).

5. Intolerance to and/or difficulty with blood sampling through venipuncture.

6. Use of any prescription medication within 30 days prior to drug administration (except for hormonal contraceptives).

7. Use of any over-the-counter medications or vitamins (including herbal and/or dietary supplements and/or teas) within 14 days prior to drug administration (except for spermicidal/barrier contraceptive products).

8. Use of any statins (e.g. lovastatin, simvastatin), bile acid sequestrants (e.g. cholestyramine), aspirin, antihypertensive therapy, vasoactive drugs (e.g. nitrates), calcium channel blockers, adrenergic blocking agents, anticoagulants and vitamins (e.g. multivitamins) within 30 days prior to drug administration.

9. Women who are pregnant, planning to become pregnant during the study or are nursing.