ABSTRACT
Seventeen patients with hypertension and osteoarthritis participated in a single-blind crossover study comparing the effects of sulindac 200 mg twice daily, naproxen 500 mg twice daily, and placebo on blood pressure. All patients were treated for hypertension with propranolol monotherapy. Blood pressures were back-titrated to achieve a baseline diastolic blood pressure of 90 to 100 mm Hg while taking naproxen. There were no significant differences in mean sitting or standing blood pressures among the patients receiving naproxen, sulindac, or placebo treatments. There was no change in pulse, weight, or any of the laboratory measurements at the end of each treatment phase. These results suggest that neither sulindac nor naproxen interferes with propranolol therapy for uncomplicated hypertension.
Subject(s)
Hypertension/drug therapy , Indenes/therapeutic use , Naproxen/therapeutic use , Propranolol/therapeutic use , Sulindac/therapeutic use , Blood Pressure/drug effects , Blood Urea Nitrogen , Body Weight/drug effects , Clinical Trials as Topic , Creatinine/blood , Drug Interactions , Humans , Hypertension/physiopathology , Middle Aged , Naproxen/adverse effects , Potassium/blood , Propranolol/adverse effects , Pulse/drug effects , Random Allocation , Renin/blood , Sodium/blood , Sulindac/adverse effectsABSTRACT
The contamination potential of sterile disposable plastic syringes was evaluated after subjecting the syringes to both simulated in-use conditions and an intentional microbial challenge. Lots of 20 Luer-lock syringes in 10 or 12-cu cm and 20- or 30-cu cm sizes from three manufacturers were tested. Sampling was conducted using 30-ml vials of sterile aerobic culture media containing 14C-labeled substrates. Microbial contamination was confirmed by both visual observation of the turbidity caused by colonization and instrumental detection of 14CO2 caused by the microbial metabolism of 14C-substrates. No contamination of 120 samples was found after the ribbed plunger shaft was grasped by a bare, unprepared dry hand during five cycles of filling and injecting the medium into the vials without removing the needles from the stoppers. When this sampling technique was applied to the syringes inoculated on the upper piston surface with Bacillus subtilis suspension, a 100% contamination rate was observed in 120 samples each under both positive and negative in-vial pressure. Grasping the ribbed plunger shaft of disposable plastic syringes with a dry bare hand did not compromise the sterility of the syringe contents in this study; however, this practice should be avoided when possible. Personnel should absolutely avoid introducing fluid-borne microbial contaminants into the distal barrel end of these syringes because the contents are readily labile to contamination under these conditions.
