1. M. A. El-Sayed, H. Abdine and Y.M. El-Sayed. Use of first derivative absorption spectrum in quantitative analysis of theobromine-sodium salicylate mixture. Acta
Pharm. Juguslav ., 27 , 161-165, 1977.
2. H. Abdine, M. Abdel-Hady El-Sayed and Yousry M. El-Sayed.
Spectrophotometric determination of hydrochlorothiazide and reserpine in combination. Analyst . 103 , 354-358, 1978.
3. H. Abdine, M. Abdel-Hady El-Sayed and Yousry M. El-Sayed. pH induced difference spectrophotometric assay of acetazolamide, hydrochlorothiazide and furosemide.
J. Assoc. Off. Anal. Chem ., 61 , 695-701, 1978.
4. M. Abdel-Hady El-Sayed, Yousry M. El-Sayed and H. Abdine.
Spectrophotometric determination of theophylline formulation. J. Pharm. Sci ., 63 ,
9-11, 1979.
5. M. Abdel-Hady El-Sayed, Yousry M. El-Sayed and H. Abdine. Use of an orthogonal function in differential spectrophotometry.
Analyst . 105 , 222-226,
1980.
6. Yousry M. El-Sayed and Wolfgang Sadee. Metabolic activation of Ftorafur (R,S-
1-(tetrahydro-2-furanyl)-5-Fluorouracil, FT). The microsomal oxidative pathway.
Biochem. Pharmacol ., 31 , 3006-3008, 1982.
7. Yousry M. El-Sayed and Wolfgang Sadee. Metabolic activation of (R,S-1-
(tetrahydro-2-furanyl)-5-Fluorouracil (FTORAFUR) to 5-Fluorouracil by soluble enzymes. Cancer Research , 43 : 4039-4044, 1983.
8. Bin Trong Nguyen, Yousry M. El-Sayed and Wolfgang Sadee. Interaction among the distinct effects of adenine and guanine depletion in mouse lymphoma cells.
Cancer Research , 44: 2272-2277, 1984.
9. Abdullah M. Al-Fares, Siraj A. Mira and Yousry M. El-Sayed. Evaluation of the fluorescence polarization immunoassay for quantitation of digoxin in serum. J.of
Therapeutic Drug Monitoring , 6 : 454-457, 1984.
10. Abdul Rahman Ashy, Yousry M. El-Sayed and Samira I. Islam. Comparison of fluorescence polarization immunoassay and high performance liquid chromatography for quantitative determination of phenytoin, phenobarbital and carbamazepine in serum J. of Pharmacy and Pharmacology , 38 : 572-577, 1986.
1

11. Siraj A. Mira, Yousry M. El-Sayed and Samira I. Islam. Simultaneous measurement of phenobarbital, carbamazepine, phenytoin and 5- (4- hydroxyphenyl)-5-phenylhydantoin in serum by high performance liquid chromatography. Analyst.
122 : 56-60, 1987.
12. Mohamed E. Abdel-Hamid, Naji M. Najib, Mohammad S. Suleiman and Yousry
M. El-Sayed. Differential spectrophotometric, fluorimetric and high-performance liquid chromatographic determination of diflunisal and its tablets. Analyst , 122 :
1527-1530, 1987.
13. N.M. Najib, M.S. Suleiman, Yousry M. El-Sayed and M.E. Abdel-Hamid. High
performance liquid chromatographic analysis of cephalexin in serum and urine.
J. of Clinical Pharmacy and Therapeutics , 12 , 419-426, 1987.
14. Yousry M. El-Sayed, Mohamed E. Abdel-Hamid, Mohammed S. Suleiman and
Naji M. Najib. A rapid and sensitive high-performance liquid chromatographic method for the determination of diclofenac sodium in serum and its use in pharmacokinetic studies.
J. Pharmacy and Pharmacology , 40 : 727-729, 1988.
15. Hanan N. Alkaysi, Mutaz Sheikh Salem, and Yousry M. El-Sayed. High performance liquid chromatographic analysis of caffeine concentrations in plasma and saliva.
J. of Clinical Pharmacy and Therapeutics , 13 , 109-115, 1988.
16. Osama S. Tayeb, Abdullah M. Al-Fares, Yousry M. El-Sayed and Samira I.
Islam. Correlation between predicted and measured digoxin serum concentration.
J. of Clinical Pharmacy and Therapeutics , 13 , 159-163, 1988.
17. M.S. Suleiman, N.M. Najib, Y.M. El-Sayed and M.E. Abdel-Hamid. A bioequivalence study of six brands of cephalexin.
J. of Clinical Pharmacy and
Therapeutics , 13 , 65-72, 1988.
18. Y.M. El-Sayed, M.S. Suleiman, M. Hasan, N. Najib, H. Muti, and M.
Abdulhameed. Comparative bioavailability and in-vitro characterization of two brands of diclofenac sodium enteric-coated tablets. International J. Clinical
Pharmacology Therapy and Toxicology , 26 , 487-491, 1988.
19. Yousry M. El-Sayed and Samira I. Islam. High performance liquid chromatographic analysis of theophylline in serum and its use in therapeutic drug monitoring.
J. of Clinical Pharmacy and Therapeutics , 14 , 35-43, 1989.
20. H. N. Alkaysi, M.A. Sheikh Salem, A.M. Gharaibeh, Y.M. El-Sayed, K.I. Ali
Gharaibeh, and A.A. Badwan. Bioequivalency of ranitidine tablet dosage forms.
J. of Clinical Pharmacy and Therapeutics , 14 , 111-117, 1989.
2

21. Yousry M. El-Sayed and Samira I. Islam. Comparison of fluorescence polarization immunoassay and high-performance liquid chromatography for the determination of theophylline in serum.
J. of Clinical Pharmacy and
Therapeutics , 14 , 127-134, 1989.
22. Yousry M. El-Sayed. Performance of two predictive methods for calculation of key pharmacokinetic parameters for gentamicin dosage individualization. J. of
Clinical Pharmacy and Therapeutics , 14 , 119-126, 1989.
23. Yousry M. El-Sayed and Samira I. Islam. Phenytoin Michaelis-Menten
Pharmacokinetics in Saudi patients.
International J. of Clinical
PharmacologyTherapy and Toxicology . 27 , 173-178, 1989.
24. M.S. Suleiman, N.M. Najib, Y.M. El-Sayed and A. Badwan. Stability-indicating high-performance liquid chromatographic assay for the determination of
metoclopramide in pharmaceutical dosage forms.
Analyst . 114 , 365-368, 1989.
25. M.S. Suleiman, N. Najib, Y. El-Sayed, M. Hasan and M. Abdel-Hamid. A study on the relative bioavailability of a sustained-release formulation of diclofenac sodium. International J. of Clinical Pharmacology Therapy and Toxicology , 27 ,
276-279, 1989.
26. M. E. Abdel-Hamid, M.S. Suleiman, Y.M. El-Sayed, N.M. Najib and M.M.
Hasan. A rapid high performance liquid chromatographic assay of glibenclamide in serum. J. of Clinical Pharmacy and Therapeutics, 14 , 181-188, 1989.
27. Y. M. El-Sayed and S.I. Islam. Acetylation phenotyping of isoniazid using a simple and accurate high-performance liquid chromatography. J. of Clinical
Pharmacy and Therapeutics , 14 , 197-205, 1989.
28. Yousry M. El-Sayed and Samira I. Islam. Effect of age and renal function on gentamicin pharmacokinetic parameters.
International J. of Clinical
Pharmacology Therapy and Toxicology , 27 , 503-509, 1989.
29. M.S. Suleiman, H.Y. Muti, M.E. Abdel-Hamid, M. Hasan, Y.M. El-Sayed and
N.M. Najib. A stability-indicating HPLC analysis of famotidine and its application to kinetic studies. Analytical Letters, 22 , 1499-1512, 1989.
30. Y.M. El-Sayed, M.S. Suleiman, M.M. Hasan, M.E. Abdel-Hamid, N.M. Najib,
E.S.E. Sallem and M.S. Shubair. Comparison of the pharmacokinetics and pharmacodynamics of two commercial products containing glibenclamide.
International J. of Clinical Pharmacology Therapy and Toxicology , 27 , 551-
557, 1989.
3

31. M.M. Hasan, Y.M. El-Sayed and A.A. Abdulaziz. The effect of oral activated charcoal on the systemic clearance of gentamicin in rabbits with acute renal failure. J. of Pharmacy and Pharmacology , 42 : 85-88, 1990.
32. Yousry M. El-Sayed and Samira I. Islam. Comparison between non-kinetic and kinetic approach for individualization of gentamicin dosage. European J.
of
Clinical Pharmacology , 39 , 155-159, 1990.
33. A.A. Al-Angary, Y.M. El-Sayed, M.A. Al-Meshal and K.M. Lutfi. Highperformance liquid chromatographic analysis of indomethacin in serum. J. of
Clinical Pharmacy and Therapeutics , 15 , 257-265, 1990.
34. Mohamed A. Al-Meshal, Yousry M. El-Sayed, Abdulaziz A. Al-Angary, Khalil
M. Lutfi and M. Wafik Gouda. Interruption of the enterohepatic circulation of indomethacin by cholestyramine in rabbits.
International J. of Pharmaceutics , 64 ,
155-160, 1990.
35. Y. M. El-Sayed and M.M. Hasan. Enhancement of morphine clearance following intravenous administration by oral activated charcoal in rabbits. J.of Pharmacy and Pharmacology , 42 , 538-541, 1990.
36. A.A. Al-Angary, Y. M. El-Sayed, M.A. Al-Meshal, M.M. Al-Dardiri and G. M.
Mahrous. A sensitive high-performance liquid chromatographic analysis of propranolol in serum. J. of Clinical Pharmacy and Therapeutics , 16 , 93-101,
1991.
37. M. Hasan, N. Najib, M. Suleiman, Y. El-Sayed and M. Abdel-Hamid. In-vitro and in-vivo evaluation of sustained-release and enteric- coated microcapsules of diclofenac sodium. Drug Development and Industrial Pharmacy , 18 , 1981-1988,
1992.
38. M.A. Al-Meshal, Y. M. El-Sayed, A.A. Al-Angary and M.M. Al-Dardiri. Effect of oral activated charcoal on propranolol pharmacokinetics following intravenous
administration to rabbits. J. of Clinical Pharmacy and Therapeutics , 18 , 39-44,
1993.
39. El-Sayed, Y. M., Niazy, E.M., Tawfik, A.F., Al-Dardiri, M.M. Effect of oral activated charcoal on vancomycin clearance in rabbits with acute renal failure.
Drugs under Experimental and Clinical Research , XIX (1), 19-24, 1993.
40. Y. M. El-Sayed, E.M. Niazy and S.H. Khidr. High-performance liquid chromatographic method for the determination of nifedipine in plasma and its use in pharmacokinetic studies. J. of Clinical Pharmacy and Therapeutics , 18 , 325-
330, 1993.
4

41. Khalid F. Tabbara, Yousry M. El-Sayed, Hendrik Cooper, and Sawsan Nowailaty.
Ocular bioavailability of cyclosporin in pigmented and albino rabbits.
Recent
Advances in Uveitis , 501-507, 1993.
42. Yousry M. El-Sayed, Mohamed A. Al-Meshal, Abdulaziz A. Al-Angary and
Khalil M. Lutfi. Effect of colestipol on indomethacin pharmacokinetics in rabbits.
Saudi Pharmaceutical J.
, 1 , 56-61, 1993.
43. Yousry M. El-Sayed, Mohamed A. Al-Meshal, Abdulaziz A. Al-Angary, Khalil
M. Lutfi and M. Wafik Gouda. The effect of colestipol and cholestyramine on the systemic clearance of intravenous ibuprofen in rabbits. J. of Pharmacy and
Pharmacology , 46 , 73-75, 1994.
44. Yousry M. El-Sayed, Sayed H. Khidr and Esmail M. Niazy. A rapid and sensitive high-performance liquid chromatographic method for the determination of metoclopramide in plasma and its use in pharmacokinetic studies.
Analytical
Letters , 27 (1), 55-70, 1994.
45. Khalil I. Al-Khamis, Yousry M. El-Sayed, Khalid A. Al-Rashood and Mohamed
Al-Yamani. High-performance liquid chromatographic method for determination of glibenclamide in human plasma.
Analytical Letters , 27 (6),1277-1293, 1994.
46. M.A. Bayomi and Y. M. El-Sayed. Casein microbeads as a controlled parenteral drug delivery system.
Drug Development and Industrial Pharmacy , 20 (16), 2607-
2617, 1994.
47. E.M. Niazy, S.H. Khidr and Y. M. El-Sayed. High-performance liquid chromatographic determination of meclofenamate sodium in plasma. J. of
Chromatography , 17 (11), 2331-2341, 1994.
48. Yousry M. El-Sayed, Mohamed A. Al-Meshal, Abdulaziz A. Al-Angary,
Sulaiman R. Al-Balla and M. Wafik Gouda. Effects of oral administration of colestipol and cholestyramine on the pharmacokinetics of ketoprofen administered intramuscularly in man.
International J. of Pharmaceutics , 109 ,
107-113, 1994.
49. Mohamed A. Al-Meshal, Yousry M. El-Sayed, Sulaiman R. Al-Balla, M. Wafik
Gouda. The effect of colestipol and cholestyramine on ibuprofen bioavailability in man. Biopharmaceutics and Drug Disposition , 15 , 463-471, 1994.
50. Al-Balla, S.R., El-Sayed, Y. M., Al-Meshal, M.A. and Gouda, M.W. The effect of cholestyramine and colestipol on the absorption of diclofenac in man.
International J. of Clinical Pharmacology and Therapeutics , 32 (8), 441-445,
1994.
5

51. Ehab A. Hosny, Yousry M. El-Sayed, Mohamed A. Al-Meshal and Abdulaziz A.
Al-Angary. Effect of food on bioavailability of bioadhesive-containing indomethacin tablets in dogs. International J. of Pharmaceutics , 112 , 87-91,
1994.
52. El-Sayed, Y. M. Correlation between nephrotoxicity and pharmacokinetic parameters of gentamicin. J. of Clinical Pharmacy and Therapeutics.
19 , 267-
271, 1994.
53. M. Wafik Gouda, Yousry M. El-Sayed, Mohamed A. Al-Meshal, Esmail M.
Niazy, Sabah Al-Rayes and Atef O. Ismail. Comparative bioavailability of two tablet formulations of diclofenac sodium. Saudi Pharmaceutical J.
, 2 (2), 90-93,
1994.
54. Al-Khamis, K.I., Jim, L.K., Bawazir, S.A., Ashour, L.F., El-Sayed, N. and
El-Sayed, Y. M. Effect of famotidine on ciprofloxacin pharmacokinetics after single intravenous and oral doses in rats.
J. of Clinical Pharmacy and
Therapeutics , 19 , 335-339 , 1994.
55. Al-Khamis, K.I., El-Sayed, Y.M., Al-Rashood, K.A. and Bawazir, S.A. Highperformance liquid chromatographic determination of ranitidine in human plasma. J.
of Liquid Chromatography, 18 (2), 277-286, 1995.
56. Niazy, E.M., El-Sayed, Y. M. and Khidr, S.H. Analysis of prazosin in plasma by high-performance liquid chromatography using fluorescence detection. J. of
Liquid Chromatography, 18 (5), 977-987, 1995.
57. Yousry M. El-Sayed. A simple high-performance liquid chromatographic assay for sparfloxacin in human plasma.
Analytical Letters, 28 (2), 279-293, 1995.
58. El-Sayed, Y. M., Niazy, E.M. and Khidr, S.H. High-performance liquid chromatographic method for the quantitative determination of pheniramine in plasma. J. of Liquid Chromatography, 18 (4), 763 - 777, 1995.
59. Yousry M. El-Sayed, Esmail M. Niazy, Sabah Al-Rayes, Atef O. Ismail and
M.Wafik Gouda. Comparative bioavailability of two tablet formulations of metoclopramide hydrochloride.
International J. of Clinical Pharmacology and
Therapeutics, 32 (3), 136-139, 1995.
60. Yousry M. El-Sayed, M. Wafik Gouda, Khalil I. Al-Khamis, Mohammed A.
Al-Meshal, Abdulatif A. Al-Dhawailie, Sabah Al-Rayes, Salih A. Bin-Salih and
Khalid A. Al-Rashood. Comparative bioavailability of two tablet formulations of ibuprofen. International J. of Clinical Pharmacology and Therapeutics,33 (5),
294 - 298, 1995.
6

61. Yousry M. El-Sayed, Khalid F. Tabbara and M. Wafik Gouda. Effect of acetazolamide on the pharmacokinetics of cyclosporin in rabbits. International J. of Pharmaceutics , 121 , 181 - 186, 1995.
62. Yousry M. El-Sayed, Esmail M. Niazy and Sayed H. Khidr. In-vivo evaluation of sustained-release microspheres of metoclopramide hydrochloride in beagle dogs.
International J. of Pharmaceutics, 123 , 113 - 118 , 1995.
63. Sayed H. Khidr, Esmail M. Niazy, and Yousry M. El-Sayed . Preparation and invitro evaluation of sustained-release metoclopramide hydrochloride microspheres.
J. microencapsulation, , 12 , 651 - 660, 1995.
64. M. E. Abdullah and Yousry M. El-Sayed. Design of crossover microcomputer program and application on drug bioequivalence data. Computer Methods and
Programs in Biomedicine , 48 , 237 - 239 , 1995.
65. Mohammad J.M.S. Al-Yamani, Yousry M. El-Sayed, J.S. Kaka, S.R. Al-Balla, A.
Al-Shareef and Khalil I. Al-Khamis. Comparative bioavailability of three commercially available cimetidine tablet formulations in healthy male volunteers.
Saudi Pharmaceutical J.
, 3 , 196 - 200, 1995.
66. Esmail M. Niazy, Yousry M. El-Sayed and Sayed H. Khidr. Effect of formulations and penetration enhancers on percutaneous absorption of haloperidol. Saudi Pharmaceutical J.
, 2 (3), 123 - 129, 1995.
67. Esmail M. Niazy, Yousry M. El-Sayed and Sayed H. Khidr. Rapid highperformance liquid chromatographic analysis of procainamide and Nacetylprocainamide in plasma. Saudi Pharmaceutical J.
, 4 ,29 - 35 , 1995.
68. El-Sayed, Y.M., Khidr, S.H., and Niazy, E.M. High-performance liquid chromatographic assay for the determination of haloperidol in plasma. J. of
Liquid Chromatography, 19 ( 1 ) , 125 - 134 , 1995.
69. Yousry M. El-Sayed. Predictive performance of four pharmacokinetic methods for calculating digoxin dosage. J. of Clinical Pharmacy and Therapeutics , 20 , 297
- 304 , 1995.
70. Esmail M. Niazy, Yousry M. El-Sayed and Sayed H. Khidr. Effect of accelerated storage conditions on the dissolution and bioavailability of amitriptyline from sustained-release capsules. Saudi Pharmaceutical J.
, 4 , ( 2 ) 92 - 98 , 1996.
71. Khalil I. Al-Khamis, Juzar S. Kaka, Mohammad J. Al-Yamani, Sulaiman Al-Balla,
Yousry M. El-Sayed, and Saleh A. Khalil. Bioequivalence of commercial ranitidine tablets. Alexandria J. Pharmaceutical. Sci ., 10 (2) 97 - 100 , 1996.
7

72. S.A. Bawazir, M. Wafik Gouda, Y.M. El-Sayed, K.I. Al-Khamis, M.J.Al-Yamani,
E.M. Niazy, and K.A. Al-Rashood. Comparative bioavailability of two tablet formulations of ranitidine Hydrochloride in healthy volunteers. International J. of
Clinical Pharmacology and Therapeutics, 36 ( 54) 270 - 274, 1998.
73. Mohammad J.M.S. Al-Yamani, Khalil I. Al-Khamis, Yousry M. El-Sayed, Saleh.
A. Bawazir, K.A. Al-Rashood, and M. Wafik Gouda. Comparative bioavailability of two tablet formulations of acyclovir in healthy volunteers. International J. of
Clinical Pharmacology and Therapeutics, 36 (4) 222 -226, 1998.
74. Sayed H. Khidr, Esmail M. Niazy, and Yousry M. El-Sayed. Effect of storage on the in-vitro and in-vivo characteristics of some marketed sustained-release cardiovascular tablets. Bull. Pharm. Sci., Assiut University, 21 (2), 171 - 183,
1998.
75. S. H. Khidr, E. M. Niazy, and Y. M. El-Sayed. Development and in-vitro evaluation of sustained-release meclofenamic acid microspheres.
J. microencapsulation, 15 , 153 - 162, 1998.
76. Khalid A. Al-Rashood, Khalil I. Al-Khamis, Esmail M. Niazy, Yousry M.
El-Sayed, Saleh A. Al-Suwayeh, Mohammed J. Al-Yamani, Suliman A. Al-Balla,
S. Mahmood Alam and Ruwayda Dham. Comparative bioavailability study of metronidazole 500 mg tablets (Negazole and Elyzol) for bioequivalence evaluation in healthy adult subjects.
Modern Medicine , 16 (9), 46 - 53, 1999.
77. Mansour S. Al Said, Khalid A. Al-Rashood, Khalil I. Al-Khamis, Esmail M.
Niazy, Yousry M.El-Sayed, Mohammed J. Al-Yamani, Suliman A. Al-Bella,
Tawfik A. Al Najjar, S. Mahmood Alam and Ruwayda Dham. Bioequivalence evaluation of 500 mg amoxicillin capsules (Julphamox Vs Amoxil) in healthy human volunteers-single dose under fasting conditions.
Modern Medicine ,
16 (9), 73 - 77, 1999.
78. Khalid A. Al-Rashood, Khalil I. Al-Khamis, Yousry M. El-Sayed, Suliman Al-
Balla, Mohammed J. Al-Yamani, S. Mahmood Alam and Ruwayda Dham.
Bioequivalence Evaluation of Lomefloxacin 400 mg Tablets (Lomax Versus
Maxaquin) in Healthy Human Volunteers.
Biopharmaceutics & Drug Disposition,
20 , 407 - 410, 1999.
79. Khaled A. Khaled and Yousry M. El-Sayed. High-performance liquid chromatographic assay for the determination of quercetin in plasma. J. of Liquid
Chromatography and Related Technologies, 23(3) , 455 - 465, 2000 .
8

80. Khalid A. Al-Rashood, Khalil I. Al-Khamis, Yousry M. El-Sayed, Suliman Al-
Balla, Mohammed J. Al-Yamani, S. Mahmood Alam and Ruwayda Dham.
Bioequivalence Evaluation of Norfloxacin 400 mg Tablets (Uroxin Versus
Noroxin) in Healthy Human Volunteers.
Biopharmaceutics & Drug Disposition ,
21 , 175 - 179, 2000.
81. Mansour S Al-Said, Khalil I. Al-Khamis, Esmail M Niazy, Yousry M. El-Sayed,
Khalid A Al-Rashood, Sulaiman Al-Bella, Mohammed J. Al-Yamani, Tawfeeq A
Al-Najjar, Syed M Alam, Ruwayda Dham Q Zaman Qumaruzaman.
Bioequivalence Evaluation of two brands of cefuroxime 500 mg tablets
(Cefuzime® and Zinnat®) in Healthy Human Volunteers.
Biopharmaceutics &
Drug Disposition , 21 , 205 - 210, 2000.
82. Khaled A. Khaled, Ibrahim Al-Bawardi and Yousry M. El-Sayed. Effect of formulation and penetration enhancers on the diffusional parameters for the percutaneous absorption of propranolol hydrochloride. Bull. Pharm. Sci. Assiut
University, 24 , 65-71, 2001.
83. Khaled A. Khaled, Yousef Assiri and Yousry M. El-Sayed. In vivo evaluation of hydrochlorothiazide liquisolid tablets in beagle dogs. International J. of
Pharmaceutics, 222 , 1-6, 2001.2001.
84. K. A. Khaled, Y. M. El-Sayed, I. S. Al-Bawardi, and A. S. El-Gorachi.
Bioavailability of propranolol HCl following oral and transdermal administration in rabbits. Bull. Pharm. Sci. Assiut University, 25 , 105 - 110, 2002.
85. Khaled A. Khaled, Yousry M. El-Sayed, Badr M. Al-Hadiya. Disposition of the flavonoid quercetin in rats after single intravenous and oral doses. Drug
Development and Industrial Pharmacy , 29 (4), 397 - 403, 2003.
86. I.A. Alsarra, M.S. Al-Said, K.I. Al-Khamis, E.M. Niazy, Y.M. El-Sayed, K.A.
Al-Rashood , M.J.Al-Yamani and S.A. Al-Balla. Comparative bioavailability study of doxycycline hyclate (equivalent to 100 mg doxycycline) capsules
(doxycin vs vibramycin) for bioequivalence evaluation in healthy adult volunteers. International J. of Clinical Pharmacology and Therapeutics, 42 (7)
373 - 377, 2004.
87. I. Alsarra, E. Niazy, Y. El-Sayed, K. Al-Khamis, and M. Ibrahim. High performance liquid chromatographic method for determination of doxycycline in human plasma and its application in pharmacokinetic studies Saudi
Pharmaceutical J.
, 13 (1), 42 - 47 , 2005.
9

88. Kamal M. Matar, Esmail M. Niazy, Yousry M. El-Sayed, Mohammed J. Al-
Yamani, Saleh A. Al-Suwayeh and Khalil I. Al-Khamis. Quantitative determination of Clavulanic acid in plasma by HPLC: Application to a pharmacokinetic study. J. of Liquid Chromatography and Related Technologies,
28 , 97 - 107, 2005.
89. Y. A. Asiri, M. S. Al-Said, K. I. Al-Khamis, E. M. Niazy, Y.M. El-Sayed, K. A.
Al-Rashood , M. J.Al-Yamani, I. A. Alsarra and S. A. Al-Balla. Comparative bioavailability study of cefixime (equivalent to 100 mg/5 mL) suspension (Winex vs Suprax) in healthy male volunteers. International J. of Clinical Pharmacology and Therapeutics, 43 (10) 499 – 504, 2005.
90. Amal H. El-Kamel, Doaea H. Al-Shora, and Yousry M. El-Sayed. Formulation and pharmcodynamic evaluation of captopril sustained release microparticles.
J. microencapsulation, 23 (4) 389 – 404, 2006.
91. A. M. Al-Mohizea, A. A. Kadi, A. M. Al-Bekairi, S. A. Al-Balla, M. J.Al-
Yamani, K. I. Al-Khamis, E. M. Niazy and Y.M. El-Sayed. Bioequivalence evaluation of 320 mg gemifloxacin tablets in healthy volunteers. International J. of Clinical Pharmacology and Therapeutics, 45 (11) 617 – 622, 2007.
10