Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0010200 (cough)
 23,843 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A simple, rapid and accurate method for the simultaneous determination of active ingredients in cough-cold mixtures using isocratic reversed-phase ion-pair high-performance liquid chromatography has been developed. It involves the use of an octadecylsilane column as the stationary phase with methanol, water, tetrahydrofuran, phosphoric acid mixtures as mobile phase including sodium dioctylsulphosuccinate as the ion-pair agent. The pH of the mobile phase was adjusted to 4.6 by means of phosphoric acid and ammonium hydroxide solutions. The proposed method involves the simple dilution of the samples with the mobile phase and the addition of metoclopramide hydrochloride as the internal standard. The active ingredients under investigation were chlorpheniramine, codeine, diphenhydramine, ephedrine, ethylmorphine, phenylephrine, phenylpropanolamine and pholcodine, which exist as various combinations in cough-cold mixtures. The optimum composition of the mobile phase and the optimum flow rate were determined and are reported. The method was applied to the determination of active ingredients in seven commercially available cough-cold mixtures.
 ...
PMID:The simultaneous determination of active ingredients in cough-cold mixtures by isocratic reversed-phase ion-pair high-performance liquid chromatography. 257 52

Using a simulated cough machine, we analyzed the effect of adding tensio-active liquids as sol phase simulant on the clearance of gel mucus simulant by cough. Polysaccharides crosslinked with sodium tetraborate were used at different concentration as gel mucus simulant. A drop of gel mucus simulant was deposited either directly on the model trachea or on a sol phase layer simulant (2% sodium dodecyl sulfate in water). The clearance of the mucus simulants was quantified by observing the movement of marker particles in the gel layer. The viscoelastic properties of gel mucus simulants were determined by using a viscoelastometer (SEFAM). The adhesive properties were analyzed by means of the platinum ring technique. The wettability of the mucus simulants was quantified by the automatic measurement of the contact angle of the drop of gel on the model trachea. We found that the addition of a sol phase significantly decreased by about 50% the adhesivity and wettability of the gel mucus simulants. This decrease was associated with a marked enhancement of cough clearance, whatever the viscoelastic properties of the gel mucus simulants. These results suggest that the sol phase is essential in bronchial respiratory mucus clearance by the cough mechanism.
 ...
PMID:The role of mucus sol phase in clearance by simulated cough. 261 68

We investigated the role of the viscoelastic and adhesive properties of mucus gel simulants on the clearance of mucus by simulated cough. Mucus-like gels with widely varying viscoelastic properties were prepared from polysaccharides crosslinked with sodium borate. Cough was simulated by opening a solenoid valve connecting a model trachea to a pressurized tank. The clearance of gels lining the model trachea was quantified by observing marker particle transport. Viscosity elastic modulus, relaxation time and yield stress were measured with a steady-shear viscoelastometer. Spinnability (thread formation) was determined with a filancemeter. Adhesivity (surface tension) was measured by the platinum ring technique. The viscoelastic and adhesive properties of the mucus gel simulants spanned the ranges observed for bronchial secretions from patients with COPD. The relationship between simulated cough clearance and the viscoelastic and adhesive properties of the gels was analyzed by stepwise linear regression of the non-zero data matrix. The major independent variable relating to clearance was viscosity. Secondary, but highly significant dependences, were also found for spinnability and adhesivity. Elastic modulus, relaxation time and yield stress had no independent effect on cough clearance over the investigated range. The results indicate that, in the absence of airway surface liquid, cough-type clearance relates primarily with mucus gel viscosity. For a given viscosity, clearance is also impaired by spinnability, i.e. the capacity of the mucus to form threads. At constant viscosity and spinnability, clearance is further impaired by an increase in the adhesivity of the mucus. The negative dependence of each of these physical factors can be rationalized in terms of their inhibitory effect on wave formation in the mucus lining layer during high velocity airflow interaction.
 ...
PMID:The role of mucus gel viscosity, spinnability, and adhesive properties in clearance by simulated cough. 261 67

Exercise and physical fitness are becoming increasingly popular in our society. As a result there are more individuals who are at risk for the development of acute respiratory emergencies associated with sports and athletics. EIB is a common feature of asthma and is characterized by a postexercise fall in FEV1 of more than 10 per cent. Although a variety of medications have been used for the prevention of EIB, cromolyn sodium and inhaled adrenergic agonists have been shown to be the most effective. EIA and cholinergic urticaria are two physical allergies in which hypotension can be brought on by exercise. In some individuals, EIA develops only in association with the ingestion of a particular food. Associated with sports and recreational activities in alpine areas is the risk of developing acute high-altitude medical problems. One of the most dramatic and potentially life threatening is high-altitude pulmonary edema. The management of this condition can be problematic, particularly if rapid descent to lower elevations is not possible. Although rare, spontaneous pneumothorax and pulmonary emboli do develop in the otherwise well-conditioned athlete. These entities must be considered when the physician evaluates any athlete in whom acute cough and dyspnea develop.
 ...
PMID:Acute respiratory emergencies in emergency treatment of the injured athlete. 266 79

Inhibitors of the angiotensin conversion enzyme (ICE) represent an effective and well tolerated therapeutic class, for the treatment of arterial hypertension. The antihypertensive efficacy or perindopril, an ICE active in one single daily dose, is at least equal to that of reference antihypertensive drugs administered at usual doses. The possibility of occurrence of some side-effects while using ICE, has resulted in a particular attention in evaluating the safety of perindopril. First, the renal function was monitored. During essential hypertension, no significant variation of the creatininemia was observed with long-term administration of the drug (12 months). In elderly hypertensive patients or patients with chronic renal insufficiency, the glomerular filtration is also preserved, except during rare occurrences of decreased creatinine clearance, especially after adjunction of hydrochlorothiazide. A discrete elevation of the kaliemia without clinical significance is observed when perindopril is used as a single drug. Reports of symptomatic hypotension with perindopril are rare (0.2%), even in situations of water and sodium depletion. Among other side-effects of ICE, cough, more recent, was thoroughly investigated. Its frequency was determined during a double blind trial comparing perindopril (1.2%) with captopril (2.4%). It was also evaluated during a long-term study concerning 632 hypertensive patients (391 patients treated in 1 year); its incidence is the 2.9 p. cent and it resulted in discontinuation of the treatment in 8 cases. In this study, 36 patients interrupted the treatment prematurily because of an adverse reaction (5.7%). Finally no harmful drug interaction was reported. The favorable tolerance profile of perindopril is combined with a beneficial effect on the functional and structural modifications of the heart and large vessels related to hypertension.
 ...
PMID:[First intention treatment of arterial hypertension. Effectiveness and safety of perindopril]. 268 25

In developing these international guidelines there were several unifying themes in the diagnosis and simple management of childhood asthma. For the purposes of the meeting, asthma was operationally defined as 'episodic wheeze and/or cough in a clinical setting where asthma is likely and other rarer conditions have been excluded'. In making a diagnosis of asthma, a full history is a prerequisite. Additional tests are only used to support clinical impression and to provide objective evidence for therapeutic recommendations. General features of a multidisciplinary approach include an appreciation of the importance of psychosocial factors, counselling, and education. Drugs should be prescribed in a rational sequence: beta 2-stimulants for mild episodic wheeze; sodium cromoglycate for mild to moderate asthma; inhaled steroids for moderate to severe asthma; with xanthines, ipratropium bromide, and oral steroids having their place in more persistent and severe cases. Children and their parents should be reassured that if asthma is properly controlled there is no reason why the child should not lead a normal and physically active life. The management of asthma is rewarding and return to 'normal' lifestyle is nearly always possible with active participation in sporting activities.
 ...
PMID:Management of asthma: a consensus statement. 262 80

Two cases of miliary tuberculosis with syndrome of inappropriate secretion of antidiuretic hormone (SIADH) were reported. Case 1. A 70-year-old woman suffering from general fatigue and appetite loss developed neck stiffness and stupor three days after admission. The chest X-ray film showed a miliary pattern in both lungs. The lumber puncture showed high pressure and increased leucocytes in the cerebrospinal fluid. Serum natrium concentration was 113 mEq/L. Tubercle bacilli were seen in the broncho-alveolar lavage fluid by the Ziehl-Nielsen staining. An improvement in electrolytes balance was produced by 2.5% NaCl and antituberculous treatment, then her mental function recovered. Case 2. A 71-year-old man was admitted with gastric ulcer. When he developed dry cough thirty days after admission, the chest X-ray film showed a miliary pattern in both lungs. Acute respiratory failure advanced concomitantly. Tubercle bacilli were seen in the sputum (Gaffky 5) by the Ziehl-Nielsen staining. Antituberculous treatment was started. Although the miliary shadow improved gradually, hyponatremia was rather progressing. The following values for serum constituents were determined: sodium, 118 mEq/L; antidiuretic hormone, 10.3 pg/ml. Antituberculous treatment and supplement of NaCl (10 g/day) improved serum natrium level. He had no mental disturbance in his clinical course. In both cases, thyroid, renal and adrenal function were normal. Systemic edema and dehydration did not exist at the state of hyponatremia, and it was very clear that laboratory data were compatible with SIADH criteria. Miliary tuberculosis is one of the least commonly recognized causes of SIADH.
 ...
PMID:[Two cases of miliary tuberculosis with SIADH]. 279 13

1. The effects of nedocromil sodium, sodium cromoglycate and codeine phosphate on citric acid-induced cough have been studied in conscious tracheostomised dogs. 2. Nedocromil sodium (approximately 15 mg given as an aerosol) and codeine phosphate (5 mg kg-1, i.v.) significantly increased the time to the first cough when dogs were challenged with citric acid aerosol. The mean number of coughs in the initial period of coughing fell after treatment of dogs with nedocromil sodium or with codeine phosphate, but this reduction in mean cough number was not statistically significant. 3. Neither sodium cromoglycate (approximately 15 mg given as an aerosol) nor saline had significant effect on a citric acid challenge. 4. It is concluded that nedocromil sodium, but not sodium cromoglycate, possesses an anti-tussive action that may result from inhibition of sensory nerve activity in the lung. Nedocromil sodium may prove useful in the treatment of unproductive cough in situations where the use of a centrally-acting antitussive is undesirable.
 ...
PMID:The effect of nedocromil sodium, sodium cromoglycate and codeine phosphate on citric acid-induced cough in dogs. 283 11

A 3-month double-blind group comparative trial of nedocromil sodium (4 mg twice daily) and placebo was carried out in 30 adult asthmatic patients maintained on bronchodilator therapy. Fifteen patients received each treatment. Subjective (asthma symptoms and severity) and objective (lung function and use of concomitant medication) variables were measured to monitor the response to trial treatments. Significant differences in favour of nedocromil sodium for night-time asthma, daytime asthma, cough, daytime bronchodilator use and clinic assessment of forced expiratory volume during the first second of expiration were observed by week 4 of the trial. The diurnal variation in peak expiratory flow rate was reduced in the nedocromil sodium treated patients. There were no serious adverse reactions and no treatment related changes in haematological findings, blood biochemistry or urinalysis.
 ...
PMID:A double-blind group comparative trial of nedocromil sodium and placebo in the management of bronchial asthma. 284 6

The safety, acceptability and efficacy of nedocromil sodium, given by metered dose inhaler at a dosage of 4 mg four times daily, were investigated in a 52-week open assessment study of 79 perennial bronchial asthmatic patients maintained on oral bronchodilator therapy. Extensive laboratory monitoring of renal, hepatic and haematological functions before, during and at the end of the study failed to provide any evidence of drug-induced toxic effects. Nedocromil sodium was well tolerated with no serious adverse effects reported. Nineteen patients were withdrawn from the study, two complaining of sore throats and one of severe cough after nearly 1 year of treatment. The remainder were withdrawn because of intolerance to theophylline (one patient), non-cooperation (three), relocation outside the trial area (seven), onset of uncontrolled asthma (two) and pregnancy (three patients). Although this was an open assessment study, analysis of the diary card measurements and clinic assessments indicated that nedocromil sodium is an effective long-term therapy in the maintenance treatment of bronchial asthma.
 ...
PMID:The acceptability, safety and efficacy of nedocromil sodium in long-term clinical use in patients with perennial asthma. 284 34


<< Previous 1 2 3 4 5 6 7 8 9 10 Next >>