Comparative Randomized, Single Dose, Two-way Crossover Open-label Study to Determine the Bioequivalence of Gabapentin From Nerpentin 600 mg (Test ) F.C.T (Aman Pharma ,Egypt.) and Gabapentin From Neurontin 300 mg (Referance ) H.G.C. ( Pfizer Egypt)

Inclusion criteria

• Healthy male and non-pregnant female.
• Subjects should be between the ages of 18 and 55 years.
• Subject's weight should be within the normal range, preferably have a Body Mass Index between 18.5 and 30 kg/m2.
• Subjects with normal range of vital signs (Blood Pressure, Pulse Rate.
• Respiratory Rate and Body Temperature).
• Normal physical examination at screening visit.
• Ability to communicate adequately with the investigator himself or his representatives.
• Ability and agreement to comply with the study requirements.
• Understanding of the study and agreement to give a written informed consent.
• The ability of the subjects to understand and comply with the study protocol has to be assessed
• Females should not be pregnant or lactating.

Exclusion criteria

• Who have a topic constitution or asthma or known allergy for Gabapentin and/or any other ingredients of the products.
• Symptomatic or asymptomatic orthostatic hypotension at screening or before the first drug administration. Systolic blood pressure less than 100 or more than 140 mm Hg and Diastolic blood pressure less than 60 mm Hg or more than 90 mm Hg.
• Pulse rate less than 60 pulse/minute or more than 100 pulse/minute.
• History or presence of significant smoking (≥10 cigarettes or consumption of tobacco products and refusal to restrain from smoking or consumption of tobacco products for 48 hours before dosing until checkout).
• History of difficulty of donating blood.
• History of difficulty of swallowing.
• Any history or presence of clinical relevance of cardiovascular, neurological, musculoskeletal, hematological, hepatic, gastrointestinal, renal, pulmonary, endocraniological, metabolism or psychiatric disease, any type of porphyria.
• Presence or history of malabsorption or any gastrointestinal surgery except appendectomy or except herniotomy.
• Participation in a drug research study or donating blood within past 2 months before screening.
• Subjects who used any of prescribed systemic or topical medication (including OTC medication) within 2 weeks before the initiation of the study (except single doses of analgesics which have no drug interaction with study product).
• History of allergic response to heparin.
• Presence or history of malabsorption or any gastrointestinal surgery except appendectomy or except herniotomy.
• Subjects who regular consumed of beverages or food containing methylxanthines (e.g. coffee, tea, cola, caffeine, chocolate, sodas,) equivalent to more than 500 mg methylxanthines per day, and refusal to abstain from consumption of these products for 48 hours before dosing until checkout).
• Founding Positive in the alcohol test done at the time of check in.
• Founding positive in the Urine drugs of abuse at time of check in.
• Intake of depot injectable solutions (including study medications) within 6 months before start of the study.
• Intake of enzyme-inducing, organotoxic or long half-life drugs within 4 weeks before start of the study.
• Special diet due to any reason, e.g. vegetarian.
• Subjects who are not suitable to any of inclusion criteria.