The purpose of this study is to investigate the effects of dexmedetomidine infusion on the stress response to intubation, postoperative analgesia, and renal functions (urinary output [UOP], creatinine and glomerular filtration rate [GFR]) in preeclamptic patient.

Inclusion Criteria:

• pregnant women
• have mild preeclampsia ( Pre-eclamptic patients will be defined as having hypertension [systolic blood pressure (SBP) ≥140 mmHg and/or diastolic blood pressure (DBP)≥90 mmHg] accompanied by proteinuria first detected after 20 weeks of gestation).
• Proteinuria is defined as at least 300 mg protein in 24 h urine collection [or ≥1+ dipstick (30 mg/dl) in a single urine sample] ).
• American Society of Anesthesiologists (ASA) physical status of II or III.
• age between 19 and 40 years

Exclusion Criteria:

• patient refusal to consent (obsolete).
• pre-existing neurological disease or psychic patients.
• history of cardiac and respiratory system failure.
• co-existing significant renal or liver disease.

double-blinding