Eligibility Criteria:
Inclusion Criteria:
Part 1:
* Nonsmoker for at least 6 months
* Body Mass Index (BMI) less than or equal to 29 kg/m2
* In overall good health
Part 2:
* Body Mass Index (BMI) greater than 18kg/m2 and less than or equal to 35kg/m2
* In overall good health (patients with hypertension and/or hyperlipidemia are accepted)
Exclusion Criteria:
Part 1:
* History of any cardiovascular disease or any clinically significant family history of cardiac arrhythmias or conduction abnormalities at an age less than 60 years
* History of any major endocrine, vascular, hematologic, gastrointestinal, hepatic, renal or genitourinary disease/disorder
* History of cancer
* Clinically significant history of a neurological disorder (includes epilepsy,stroke, transient ischemic attack, classic migraines)
* Active or history of a psychiatric disorder (includes depression, bipolar disorder, schizophrenia, anxiety)
* History of asthma, severe wheezing, COPD, or other pulmonary disease
* Individual or family history of bleeding or hemorrhagic diathesis, or bleeding difficulties
* Major surgery, donated blood or participated in another investigational drug(s) trial within 30 days
* Illicit drug use (including recreational); or history of drug or alcohol abuse (within 2 years)
* Nitrate therapy within 4 weeks
* History of significant drug allergy or history of food allergies
Part 2
* History of any clinically significant cardiac or cardiovascular disease (other than hypertension)
* History of any major endocrine, vascular, hematologic, gastrointestinal, hepatic, renal or genitourinary disease/disorder
* History of cancer
* History of a neurological disorder (includes epilepsy,stroke, transient ischemic attack, classic migraines)
* Active or history of a psychiatric disorder (includes depression, bipolar disorder, schizophrenia, anxiety)
* History of asthma, severe wheezing, COPD, or other pulmonary disease
* Individual or family history of bleeding or hemorrhagic diathesis, or bleeding difficulties
* Illicit drug use (including recreational); or history of drug or alcohol abuse (within 2 years)
* Surgery, significant blood loss, donated blood, or participated in another investigational drug(s) trial within 30 days
* Nitrate therapy within 4 weeks
* History of significant drug allergy