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Sildenafil
in Men with Coronary Artery Disease
Sildenafil
citrate (Viagra) promotes erectile function, but serious cardiovascular
events have been reported after its use. This study examined the hemodynamic
effects of sildenafil in men with severe coronary artery disease. Sildenafil
had minimal or no effects on a variety of hemodynamic measures, including
measures of coronary blood flow and flow velocity. The findings are reassuring
to men who use sildenafil, but they do not rule out the possibility of uncommon
adverse effects or drug interactions in men who also take nitrates.
Methotrexate
to Maintain Remission in Crohn's Disease
Patients with Crohn's disease often relapse.
Methotrexate induces remission in Crohn's disease, but its role in preventing
relapse in those with quiescent disease is not known. In this 40-week, placebo-controlled
study of patients who entered remission during treatment with methotrexate,
no other treatments for Crohn's disease were permitted, and methotrexate
was effective in maintaining remission.
Growth
Hormone Therapy for Crohn's Disease
Treatments for Crohn's disease are not always
effective and may have severe side effects. Growth hormone affects intestinal
growth and repair. In this preliminary study, 37 patients with moderate-to-severe
Crohn's disease gave themselves daily injections of growth hormone or placebo
for four months and continued their other medications. Patients receiving
growth hormone had significantly greater decreases in their scores on the
Crohn's Disease Activity Index than those receiving placebo injections.
Polymerized
Bovine Hemoglobin for Autoimmune Hemolytic Anemia
Transfusions in patients with autoimmune hemolytic anemia are complicated
by autoantibodies that react with erythrocytes from virtually all donors.
In rare cases, transfusions cannot sustain the hematocrit at a level compatible
with life, because the autoantibodies rapidly destroy transfused red cells.
The barrier presented by autoantibodies was circumvented in such a patient
by the use of polymerized bovine hemoglobin for transfusion, and the patient
eventually made a full recovery. |