UPI Journal of Pharmaceutical Medical, and Health Sciences

Content Available at www.uniquepubinternational.com      ISSN: 2581-4532

Open Access                                                                                                                Research Article

PRESCRIBING PATTERNS AND ANALYZING THE USAGE OF CORTICOSTEROID THERAPY AT TERTIARY CARE HOSPITAL

CH. Pavithra1, C. Mahesh1, D. Prasanth Kumar1, M. Sandhya1, N. Himasree1, T. Sai Kumar1, K. Vani2, K. Swathi Krishna3

1 B Pharmacy final year student, Saastra College of Pharmaceutical Education and Research, Nellore.

2 Assistant Professor, Dept.of Pharmacy practice, Saastra College of Pharmaceutical Education and Research, Nellore

3 Principal, Saastra College of Pharmaceutical Education and Research, Nellore.

DOI: https://doi.org/10.37022/jpmhs.v7i1.99

Article History: 

Received: 22-01-2024

Revised: 18-02-2024

Accepted: 11-03-2024

Abstract

Corticosteroids are used extensively in treating inflammation. They provide short-term symptomatic relief in abnormalities of conditions like Auto immune diseases, Dermatological and Respiratory diseases. Adverse effects of Corticosteroids include Cushing’s syndrome, Skin atrophy, contact dermatitis, tachyphylaxis, Myelosuppression, Diabetes mellitus, Hypertension, pleural effusion. As per the sources available from the regulatory authority of Central Drugs Standard Control organization, inappropriate use of Corticosteroids is more commonly practiced in India almost all the drugs are prescribed rationally. The Pharmacist can promote better patient care and drug safety. Most of the Physician is recommending the drugs are mostly branded names. Our study suggests provide it in generic names. Clinical Pharmacists in associations with clinicians must play a crucial role in minimizing the problems associated with irrational usage of corticosteriods.

Keywords: Corticosteroids, Auto immune diseases, CDSCO, dermatitis, tachyphylaxis, Myelosuppression.

*Corresponding Author
K. Vani

Introduction

Corticosteroids are used extensively in treating inflammation. They provide short-term symptomatic relief in abnormalities of conditions like Auto immune diseases, Dermatological and Respiratory diseases. Adverse effects of Corticosteroids include Cushing’s syndrome, Skin atrophy, contact dermatitis, tachyphylaxis, Myelosuppression, Diabetes mellitus, Hypertension, pleural effusion [1]. For this, prescribing pattern in the rational drug use is used to minimize the local and systemic side effects [2].  Drug treatment plays an important role in modern healthcare system to promote the public health. Prescribing pattern plays a major role in rational drug therapy. The active role of prescription pattern was  to promote the rational use of drugs. As per the sources available from the regulatory authority of Central Drugs Standard Control organization (CDSCO), inappropriate use of Corticosteroids is more commonly practiced in India [3-4].

 

 

 

Definition

According to WHO rational drug use is defined as prescribing A Right drug in Right dose, Right in terval Right frequency, appropriate to patients clinical need and available at lower cost.

The concept of rational drug use is age old as evident by the statement made by the Alexandrian physicianHerophillus300.B.C that is “Medicines are nothing but are the very hands of god if employed with the reason and prudence”

Rational drug use attains more significance now days in terms of medical, socio economical and legal aspects. Factors that have led sudden b realisation for rational drug use are:

  1. Drug explosion- increase in number of drugs available has incredibly complicated the choice of appropriate drug for particular indication
  2. Efforts to prevent the development of resistance-rational use of drug may lead to the premature demise of highly efficacious and lifesaving new antimicrobial due to development of resistance
  3. Growing awareness-Today the information about the drug development, its uses and adverse effects travel from one end of the planet to other end with amazing speed through various media.
  4. Increased cost of treatment-increase in cost of drug increase economic burden on the public as well as the government. This can be reduced by rational drug use
  5. Consumer protection Act-(CPA)- Extension of CPA in medical profession may restrict the rational use of drugs [5].

Reasons for Irrational Use of Drugs

Hazards of Irrational Use of Drugs

Irrational use of drug may lead to

 

 Measures to Promote Rational Drug Use

Medicines cannot be used rationally unless everyone involved in the pharmaceutical supply chain has access to objective information about the drug they buy and use. Knowledge and ideas about the drugs are constantly changing and a clinician is expected to know about the new development of drug therapy. The pre-requisites of rational drug use are –

Obstacles Exist in Rational Drug Use

Various obstacles in rational drug use are-

Steps to Improve Rtional Drug Prescribing

Step-I

Identify the patient’s problem based on symptoms & recognise the need for action.

Step-II

Diagnosis of the disease identifies underlying causes &motivating factors. This may be specific as in infectious disease or not specific.

Step-III

List possible intervention or treatment. This may be non-drug treatment or drug treatment. Drugs must be chosen from different alternatives based on efficacy, convenience & safety of drugs including drug interactions& high risk group of patients.

Step-IV

Start the treatment by writing an accurate and complete prescription e.g. name of the drugs with dosage forms, dosage schedule & total duration of the treatment.

Step-V

Given proper information instructions and warning regarding the treatment given e.g. side effects dosage schedule danger risk of stopping therapy suddenly.

Step-VI

Monitor the treatment to check if particular treatment has solved the patient’s problem .It may be:

  1. Passive monitoring-done by the patient himself. Explain him what to do if treatment is not effective or if too many side effects occur.
  2. Active monitoring done by physician and he make an appointment to check the response of the treatment [9].

Methodology

Aim: The aim of the study is to evaluate the prescribing patterns and analyzing the usage of Corticosteroid therapy

 

at tertiary care hospital in Nellore District, Andhra Pradesh KIMS Hospital.

Objectives of the Study

 Results

Demographic profile and patient characteristics

The demographic data & patient characteristics in the general medicine department, orthopaedics department, dermatology department in the hospital was enrolled in the study .In the study ,a total numbers  of 160 prescriptions were analysed during the study.

Table: 6 Shows Patient Enrolment  received from patients in  general medicine ,orthopaedics ,dermatology department  classified as per age from Age group  18-28 (7.5%), 29-38 28  (17.5%), 39-48 69(43.50%),49-58  32 (20.00%), 59-69  14 (8.75%),≥70 05(3.1%). & Mean ±Standard deviation 26.5±23.8.

Table :6 Demographics Data & Patient Characteristics’ in General Medicine,

Orthopaedics ,Dermatology  Department

Parameters

Age Group

Number of

Prescription

Percentage (%)

Age

18-28

12

7.5%

29-38

28

17.5%

39-48

69

43.5%

49-58

32

20.00%

59-69

14

8.75%

≥70

05

3.1%

Total

Mean ±Standard deviation

26.5±23.8

Pie chart: 1 Shows Prescriptions received from patients in general medicine, orthopaedics, dermatology department shows that Maximum numbers of prescriptions are 69 from the age group 39-48 years. Minimum of the age group are 02 Prescriptions from more than 70 years.

   image

 

Pie chart 1: Age distribution from all patients in General Medicine, Orthopaedics, Dermatology Department.

 

Table: 7 Shows prescriptions received from patients classified as per gender variation from the general medicine, orthopaedics, dermatology department   of   as Males 118 (73.00%), females 42 (27.00%) and Mean ± SD 80 ±53.74.

Table :7 Demographics Data & Patient Characteristics’ in General Medicine,

Orthopaedics ,Dermatology  Department

Parameters

Gender Variation

Number of

Prescription

Percentage (%)

Gender Variation

Male

118

73.00%

Female

42

27.00%

Total

Mean ±Standard deviation

80 ±53.74.

 Column diagram: 1 Shows prescriptions received from patients classified as per gender variation from the department of  General Medicine, orthopaedics, dermatology department   of   as Males 118  (73.00%), females 42 (27.00%)  and Mean ± SD 80 ±53.74.

  image

Column diagram 1: Age distribution from all patients in General Medicine, Orthopaedics, Dermatology Department.

Table: 8  Shows educational status   received from patients  classified as  from the general medicine ,orthopaedics ,dermatology department   of   as literate  28  (17.50%), illiterate  42 (82.50%)  and Mean ± SD 80 ±53.74.

Table :8 Gender Variation  from the General Medicine, Orthopaedics ,Dermatology  Department

Parameters

Educational status

Number of Cases

Percentage (%)

Educational status

literate

28

17.50%

Illiterate

132

82.50%

Total

Mean ±Standard deviation

80 ±73.54.

 Column diagram:2 Shows prescriptions received from patients classified as per educational status from the department of General Medicine, orthopaedics, dermatology department   of   as literate  28  (17.50%), illiterate 132 (82.50%)  and Mean ± SD 80 ±73.74. that Maximum numbers of prescriptions are 132 from the Illiterate . Minimum are 28 Prescriptions from literate.

   image

Column diagram 2 : Educational Status from all patients in General Medicine, Orthopaedics, Dermatology Department.

Table: 9 Shows Ward Wise Distribution enrolment of Prescriptions received from patients classified as from the General Medicine 94 (58.7%), orthopaedics 12 (7.5%), dermatology department 54 (33.7%) and Mean ± SD 53.33±41.04.

Table : 9     Ward Wise Distribution  Characteristics’ in General Medicine, Orthopaedics ,Dermatology  Department

Parameters

Ward Wise Distribution

Number of

Prescription

Percentage (%)

Ward Wise Distribution

General Medicine

94

58.7%

Orthopaedics

12

07.5%

Dermatology

54

33.7%

Total

Mean ±Standard deviation

53.33±41.04.

 Pie chart diagram:2 Shows prescriptions received from patients classified as per ward wise distribution  from the department of General Medicine 94 (58.7%),orthopaedics12 (7.5%), dermatology department  54 (33.7%)  of   that Maximum numbers of prescriptions are 94 from the General Medicine. Minimum are 12 Prescriptions from Dermatology Department.  

  image

Pie chart 2: Ward Wise Distribution from all patients in General Medicine, Orthopaedics, Dermatology Department.

DISCUSSION

Our study target was to know the pattern of usage of corticosteriods in urban & rural areas of Proddatur .hence the study useful to know and verify the prevalent study disease pattern and the utilisation pattern of corticosteriods in General Medicine, Dermatology, and Orthopaedic-Department. Corticosteriods are a first line anti-inflammatory treatment for all respiratory, dermatologic, joint disease [41]. It was very crucial to increase therapeutic efficacy & decrease the adverse effects of drugs. During the 6 months Period, we collected 160 cases and 282 prescriptions with corticosteriods from General Medicine, Dermatology, and Orthopaedic-Department. The data were analysed and summarised accordingly.

As comparative study of Arjan Aryal et.al.Study was performed on steroid utilization pattern in a tertiary care hospital. During the 6 months period they audited 226 patients were enrolled in the study where 27.5% were enrolled from the department of dermatology and 72.5% were enrolled from the Department of General Medicines. Male patients were 58.4% and 41.6% were female respec­tively. In our study, majority of corticosteroid received patients belonged to age group >60 years followed by age group of 51-60 years. This is sup­ported by study conducted in United Kingdom by L J Walsh et al.42 Likewise; the social status of our study reported smokers 38.93% and non-smokers 61.07%. This is supported by a study conducted by Dennis Chen et al carried out in south Texas who reported 47.7% of their patients to be smokers [43].

 The major clinical complaints of the patients admit­ted in general medicine were related to Respira­tory Tract (59.32%) followed by Dermatological complaints (33.18%), Skeletal (5%), Blood Vessel (0.88%) and Neurological (0.88%) which was simi­lar to study done by SanojVarkey et al in pulmonary department,44 TP VanStaa et al who conducted the study in general medicine department45 and a study done in Maharashtra by Wahane Pravin kumar et al who conducted the study in dermatology depart­ment.15 Non-infectious skin diseases like psoriasis topped the Table by 29.33%, followed by Eczema (16%), Pemphigus Vulgaris (8%). Infectious disease like fungal infection topped the Table (8%). This dis­ease pattern is comparable to the study conducted by CM Divysanthi et al in Karaikal16 which showed similar reports. This shows that the incidence of the skin disease depends mostly on geographical loca­tion, genetic makeup as well as environmental fac­tors.

Majority of patients were prescribed with ultra-high potent class of corticosteroids (59.56%) i.e Clobeta­sol (48.93%) and Halobetasol (10.63%) in Dermatol­ogy department. In spite of the fact that these can cause serious adverse effects, these are easily avail­able and are sold without prescription and also there is very little awareness about the potential side effects in the general public. The most widely pre­scribed corticosteroids were Budesonide (44.45%), followed by Prednisolone (15.25%), Hydrocorti­sone (14.9%), Dexamethasone (9.49%) in General Medicine department whereas Desonide (0.33%), Fluticasone (0.33%), Methyl Prednisolone (0.33%) were found to be least in both departments. As far as the indication being concerned, topical Clobeta­sol was the most prescribed drug for psoriasis. This study is comparable to SP Narwane et al [46] Inhaler administration was found to be highest (44.5%) followed by drugs administered through intravenously (24.08%), Oral administration and topical were found to be lowest (15.71%). These all data suggested that among various dosage forms of steroids use, nebulisation was most widely/ fre­quently used followed by injection, Tablets and top­ical. This data is supported by Kumar MA et al study carried out in Tamil Nadu [47]. We also found out that corticosteroids were never prescribed in any route to treat infectious skin diseases which signifies that the rational prescription is sincerely followed.

                                 It was found out that right steroids were prescribed for right indication to right patients. This assures that rationality is genuinely followed while pre­scribing. However we found some factors deviating from rationality like inappropriate drug history, Drug dose not mentioned, frequency not men­tioned, wrong administration, dose omission, illeg­ible hand writing, lack of dose tapering and steroid abuse. Not specifying these factors can lead to under usage of the medication and can lead to sub thera­peutic outcome and at the same time excessive usage can lead to unwanted effects.3,10 Few patients were found to be abusing steroids due to lack of knowl­edge towards medication. Clear instructions should be provided so that the patients are aware on how much steroid should be used and how long it should be used.48Also, Generic name for most of the drugs were not mentioned at all. Using generic names usually provides flexibility to the dispensing phar­macist and generic drugs are less expensive than the branded drugs [49].

Most of the drugs were prescribed for right indica­tion to right patient, however some factors such as in appropriate drug history, improper mentioning of dose & frequency, wrong administration time, dose omission, improper dose tapering etc. were found to be deviating away from the rationality. The use of Steroids is seen more in elderly patients that suggest that elderly patients should be monitored closely while treating them with Steroids.

 

Prescription related factors of drugs patients data obtained as per   General Medicine, Orthopaedics ,& Dermatology  Department , that Maximum numbers of prescriptions as  Inaccurate History Taken 42 (14.89%) from the disease condition . Minimum numbers of Illegal handwriting 28(9.92%)   & Mean ±Standard deviations are 35 ±9.89. steroid usage  on steroid abuse characteristics  patients data obtained as per   General Medicine, Orthopaedics ,& Dermatology  Department , that Maximum numbers of prescriptions as  steroid not abused 250 (88.65%) from the disease condition . Minimum numbers of steroid abuse 32 (11.34%)   & Mean ±Standard deviations are141±154.14.

The Study Reveals  it is very important to understand specific aspects of corticosteriods use based on dosage ,duration ,prescribed related factors, administration related factors, assessing the economic burden of corticosteriods use.  Corticosteriods are directly available in pharmacies may mislead factors for irrational use of corticosteriods. Irrational use /Abuse of topical or systemic steroids may lead to severe ADRs and affects the quality of life of patients. Future outlook of our research focus on organising workshops/conference for pharmacists on a regular interval basis in order to update and improve their knowledge on safe and rational use of these drugs, as pharmacists play an important role in counselling the patients on this behalf.

 Conclusion

  1. The prescribing pattern studies provided by clinical pharmacist at the Andhra Pradesh in Nellore District were found to be useful and beneficial to the healthcare professionals.
  2. Our study concludes that almost all the drugs are prescribed rationally.
  3. The Pharmacist can promote better patient care and drug safety.
  4. Most of the Physician is recommending the drugs are mostly branded names. Our study suggests provide it in generic names.
  5. Clinical Pharmacists in associations with clinicians must play a crucial role in minimizing the problems associated with irrational usage of corticosteriods.
  6. Our Study Concludes Most of The Physician Choice Are Ultra Potency Steriod When Compared Others Potency.
  7. In Our Study Mostly Corticosteriods Are Used In Respiratory System In General Medicine.
  8. The present study corticosteriods was mostly appropriate according to WHO protocol of standard guidelines.
  9. Dosage Adjustment in Patients Maybe Done Based on Therapeutic Drug Monitoring.

Funding

Self Funding

Acknowledgement

For all the worlds to research

Conflict of Interest

No Conflict of Interest

Inform Consent

Each patients has Consent writing for study

Ethical Statement

Study Reflections ethical statement

Author Contribution

All authors participate in the work

 References

  1. Yik-Hong Ho, Margaret Tan, Chan-Hong Chui, Adrian Leong, Kong-Weng Eu, and Francis Seow-Choen, Randomized controlled trial of primary fistulotomy with drainage alone for perianal abscesses”, “Diseases of the Colon & Rectum, Volume 40, Issue 12”Klein KB. Controlled treatment trials in irritable bowel syndrome. a critique. Gastroenterology 1988;95:232–41.
  2. Douglas A Drossman and Dan L Dumitrascu, “Rome III: New Standard for Functional Gastrointestinal Disorders”, “J Gastrointestin Liver Dis Vol.15 No.3, 237-241”
  3. DOUGLAS A. DROSSMAN, “The Functional Gastrointestinal Disorders and the Rome III Process”, “GASTROENTEROLOGY; 130:1377–1390”
  4. Osama Alaradi and Jamie S. Barkin, “Irritable Bowel Syndrome: Update on Pathogenesis and Management”, “Medical Principles And Practice”
  5. Pal D, Sahoo M, Mishra AK. Analgesic and anticonvulsant effects of saponin isolated from the stems of Opuntia vulgaris Mill in mice. Eur Bull Drug Res. 2005;13:91-7.
  6. Fermin Mearin and Peter Malfertheiner, “Functional Gastrointestinal Disorders: Complex Treatments for Complex Pathophysiological Mechanisms”, “Digestive Diseases”
  7. Vincenzo Stanghellini, “Functional Dyspepsia and Irritable Bowel Syndrome: Beyond Rome IV”, “Digestive Diseases”
  8. Gerald Holtmann, Ayesha Shah, and Mark Morrison, “Pathophysiology of Functional Gastrointestinal Disorders: A Holistic Overview”, “Digestive Diseases”
  9. Pal DK, Sahoo M, Mishra AK. Anthelmintic activity of stems of Opuntia vulgaris Mill.
  10. S J O Veldhuyzen van Zanten, N J Talley, P Bytzer, KB Klein, P J Whorwell and A R Zinsmeister, “The functional gastrointestinal disorders and the Rome II Process”, “GUT: 45(Suppl II): II69–I77)”
  11. Marie R. Griffin, Joyce M. Piper, James R. Daugherty, Mary Snowden, and Wayne A. Ray, “Nonsteroidal Anti-inflammatory Drug Use and Increased Risk for Peptic Ulcer Disease in Elderly Persons”,  “Annals Of Internal Medicine”
  12. Edward L. Bradley III, “A Clinically Based Classification System for Acute Pancreatitis”, “JAMA SURGERY”
  13. Pal D, Raj K, Nandi SS, Sinha S, Mishra A, Mondal A, Lagoa R, Burcher JT, Bishayee A. Potential of synthetic and natural compounds as novel histone deacetylase inhibitors for the treatment of hematological malignancies. Cancers. 2023 May 17;15(10):2808.
  14. Mal S, Malik U, Mahapatra M, Mishra A, Pal D, Paidesetty SK. A review on synthetic strategy, molecular pharmacology of indazole derivatives, and their future perspective. Drug Development Research. 2022 Nov;83(7):1469-504.
  15. Jean PaulGalmiche, Ray E.Clouse, AndrásBálint, Ian J.Cook, Peter J.Kahrilas, William G.Paterson, and Andre P.M.Smout, “Functional Esophageal Disorders”,  “Gastroenterology Volume 130, Issue 5
  16. HJ SteinA P BarlowT R DeMeester, and R A Hinder, “Complications of gastroesophageal reflux disease. Role of the lower esophageal sphincter, esophageal acid, and acid/alkaline exposure, and duodenal-gastric reflux”, “Annals Of Surgery”
  17. Mal S, Malik U, Pal D, Mishra A. Insight γ-Secretase: Structure, Function, and Role in Alzheimer's Disease. Current drug targets. 2021;22(12):1376-403.
  18. Donald Earl Henson, Jorge Albores-Saavedra and Donald Code, “Carcinoma of the gallbladder. Histologic types, stage of disease, grade, and survival rates”, “Cancer”
  19. J Escourrou, J A Cordova, F Lazorthes, J Frexinos, and A Ribet, “Early and late complications after endoscopic sphincterotomy for biliary lithiasis with and without the gall bladder-in situ”, “GUT Volume 25, Issue 6
  20. Pal D, Raj K, Nandi SS, Sinha S, Mishra A, Mondal A, Lagoa R, Burcher JT, Bishayee A. Potential of synthetic and natural compounds as novel histone deacetylase inhibitors for the treatment of hematological malignancies. Cancers. 2023 May 17;15(10):2808.
  21. R.W.Hatfield, J.Terblanche, S.Fataar, L.Kernoff, R.Tobias, A.H.Girdwood, R.Harries-Jones, and I.N.Marks, “PREOPERATIVE EXTERNAL BILIARY DRAINAGE IN OBSTRUCTIVE JAUNDICE: A Prospective Controlled Clinical Trial”, “NEJM Volume 320, Issue 8304
  22. Speer, R.Christopher, G.Russell, AdrianR.W.Hatfield, Kenneth D.Macrae, PeterB.Cotton, Richard R.Mason, JosephW.C.Leung, Joan Houghton, and Christin aA.Lennon, “RANDOMISED TRIAL OF ENDOSCOPIC VERSUS PERCUTANEOUS STENT INSERTION IN MALIGNANT OBSTRUCTIVE JAUNDICE”, “NEJM”
  23. FeranAgachan, Teng Chen, Johann Pfeifer, Petachia Reissman and Steven D. Wexner, “A constipation scoring system to simplify evaluation and management of constipated patients”,  “Diseases of the Colon & Rectum, Volume 39, Issue 6”
  24. Anthony Lembo and Michael Camilleri, “Chronic Constipation”, “THE NEW ENGLAND JOURNAL OF MEDICINE”
  25. Denise J.Jamieson and John F.Steege, “The prevalence of dysmenorrhea, dyspareunia, pelvic pain, and irritable bowel syndrome in primary Care Practices”, “Obstetrics & Gynecology, Volume 87, Issue 1”
  26. LiamO’Mahony, Jane McCarthy, PeterKelly, GeorgeHurley‡FangyiLuo, KersangChen, Gerald C.O Sullivan, BarryKiely, KevinCollins, Fergus Shanahan, and Eamonn M.M.Quigley, “Lactobacillus and bifidobacterium in irritable bowel syndrome: Symptom responses and relationship to cytokine profiles”
  27. Douglas K.Rex, DavidVining, and Kenyon K.Kopecky, An initial experience with screening for colon polyps using spiral CT with and without CT colonography (virtual colonoscopy)”, “Gastrointestinal Endoscopy Volume 50, Issue 3,
  28. Mark H. Whiteford, John Kilkenny III, Neil Hyman, W. Donald Buie, Jeffrey Cohen, Charles Orsay, Gary Dunn, W. Brian Perry, C. Neal Ellis, Jan Rakinic, Sharon Gregorcyk, Paul Shellito, Richard Nelson, Joe J. Tjandra and Graham Newstead, Practice Parameters for the Treatment of Perianal Abscess and Fistula-in-Ano  (Revised)”, “Diseases of the Colon & Rectum, Volume 48, Issue 7,
  29. Frank Makowiec, Ekkehard C. Jehle, Horst-DieterBecker, and Michael Starlinger, Perianal abscess in Crohn's disease”, “Diseases of the Colon & Rectum, Volume 40, Issue 4
  30. S J O Veldhuyzen van Zanten, N J Talley, P Bytzer, KB Klein, P J Whorwell and A R Zinsmeister, “Design of treatment trials for functional gastrointestinal disorders”, “GUT: 45(Suppl II): II69–II77)”
  31. Veldhuyzen van Zanten SJO, Cleary C, Talley NJ, et al. Drug treatment of functional dyspepsia. A systematic analysis of trial methodology with recommendations for the design of future trials. Am J Gastroenterol 1996;91:660–71.
  32. Talley NJ, Nyren O, Drossman DA, et al.The irritable bowel syndrome.Toward optimal design of controlled treatment trials. Gastroenterol Int 1993;6:189–211.
  33. Drossman DA, Richter JE, Talley NJ, et al (eds). The functional gastrointestinal disorders: diagnosis, pathophysiology, and treatment. McLean, VA: Degnon Associates, 1994.
  34. Drossman DA, Thompson WG, Talley NJ, et al. Identification of subgroups of functional gastrointestinal disorders. Gastroenterol Int 1990;3:159–72.
  35. Talley NJ, Weaver AL, Tesmer DL, et al. Lack of discriminant value of dyspepsia subgroups in patients referred for upper endoscopy. Gastroenterology 1993;105:1378–86.
  36. Klauser A, Voderholzer WA, Knesewitsch PA, et al. What is behind dyspepsia? Dig Dis Sci 1993;38:147–54.
  37. Talley NJ,Meineche-Schmidt V, Pare P, et al. Omeprazole is efficacious in non-ulcer dyspepsia. Can J Gastroenterol 1998;12(suppl):70–71A.
  38. Lavori PW, Louis TA, Bailar JC III, et al. Designs for experiments. Parallel comparisons of treatment. N Engl J Med 1983;309:1291–8.
  39. Pal D, Pahari SK, Mishra AK. Anthelmintic activities of roots of Cocos nucifera and aerial parts of Jasminum multiflorum. Asian journal of chemistry. 2007 Oct 1;19(7):5089.
  40. O’Donoghue DP, Dawson AM, Powell-Tuck Brown RL, et al. Double-blind withdrawal trial of azathioprine as maintenance treatment for Crohn’s disease. Lancet 1978;ii:955–7.