Bioequivalence Study of Torrent Pharmaceutical Limited's ISMN 120 mg ER Tablets Under Fasting Condition

Inclusion Criteria: * Healthy males within the age range of 18 to 55 years. * A body mass index within 18-25 Kg/m2. * Given written informed consent to participate in the study. * Absence of diseases markers of HIV 1 \& 2, Hepatitis B \& C virus and RPR. * Absence of significant disease or clinically significant abnormal laboratory values on laboratory evaluation, medical history and physical examination during the screening. * A normal 12-lead ECG. * A normal chest X-Ray. * Comprehension of the nature and purpose of the study and compliance with the requirements of the entire protocol. * No history or no evidence of hypersensitivity or idiosyncratic reactions to other nitrates or nitrites. * No history of allergic rash. * No history of significant systemic diseases. * No history of psychiatric disorders or addiction to any recreational drug or drug dependence. * No donation of blood within 56 days prior to study check-in. * No participation in any clinical study within the past 56 days. * No receipt of any prescription drugs or OTC products, with in two weeks prior to study check-in. * No history of dehydration from diarrhea, vomiting or any other reason within a period of 24 hours prior to study check-in. * No family history of neurological disorders. * Not consumed alcohol and xanthine containing food and beverages, cigarettes and tobacco products, for at-list 48 hours, prior to study check-in. * Negative results for drugs of abuse in urine and alcohol breath analysis during check-in of each period. * Not consumed grape fruit juice within the 48 hours prior to study check-in. Exclusion Criteria: * Blood pressure Systolic\> 140 mm Hg and \< 110 mm Hg Diastolic\< 70 mm Hg \> 90 mm Hg * History of seizures * History of alcohol consumption for more than 2 units/day. * High caffeine or tobacco consumption * History of difficulty with donating blood or difficulty in accessibility of veins. * Any unusual or abnormal diet, for whatever reason e.g. fasting due to religious reasons. * Used any pharmacological agents known to significantly induce or inhibit drug metabolizing enzymes within 14 days of the start of the study.