[Prescribing patterns of rofecoxib in the primary care setting: results of a French survey]. / Prescription du rofécoxib en pratique médicale courante: résultats d'une enquête française.

OBJECTIVES: To assess the prescribing patterns of rofecoxib, a selective cyclo-oxygenase-2 inhibitor or coxib relative to those of conventional non steroidal anti-inflammatory drugs (NSAIDs) in the primary care setting in France. METHODS: A representative sample of 1010 French general practitioners participated in the study. They recorded the demographic, medical and pharmaceutical characteristics of all patients for whom they prescribed an NSAID between July 1, 2001 and June 30, 2002. RESULTS: The prescribing patterns of rofecoxib were similar for both available dosages (12.5 and 25 mg). The proportion of patients aged 65 years and older was significantly higher among those receiving rofecoxib (48%) than among those receiving a traditional NSAID (37.3%). A history of peptic ulcer or gastrointestinal bleeding was more frequent in the former (4.8%) than in the latter (2.1%). Low dose aspirin and antihypertensive agents were being taken in 6.1% and 34.8%, respectively, of the patients in the rofecoxib group versus 2.3% and 15.6%, respectively, in the conventional NSAID group. Concurrent use of a proton pump inhibitor (PPI) was marginally less frequent in the rofecoxib group (16.9%) than in the conventional NSAID group (18.6%). However, a significantly higher proportion of patients were given a PPI prior to rofecoxib therapy (10.4%) than prior to conventional NSAID therapy (3.7%). CONCLUSION: Our findings show that French general practitioners are more likely to prescribe rofecoxib for patients who have risk factors of NSAID gastropathy.

Comparison of finasteride (Proscar) and Serenoa repens (Permixon) in the inhibition of 5-alpha reductase in healthy male volunteers.

A total of 32 healthy male volunteers (age range 20-30 years) were enrolled in a 1-week open, randomized, placebo-controlled study comparing finasteride (Proscar), a 5 alpha-reductase inhibitor, with Permixon, the plant extract of Serenoa repens. The objective of the study was to evaluate the effect of single and multiple doses of the drugs on the inhibition of 5 alpha-reductase as assessed by serum dihydrotestosterone level determination. Following baseline measurements on day 1, the subjects were randomized to finasteride 5 mg once a day (n = 10), Permixon 80 mg x 2 twice a day (n = 11), or to placebo once a day (n = 11) for 7 days. Serum testosterone and dihydrotestosterone levels, were determined on day 1 (baseline and 12 h) and on days 2 (24 h), 3 (48 h), 4 (72 h), 6 (120 h), and 8 (168 h). After 12 h, a single dose of finasteride 5 mg reduced the serum dihydrotestosterone level by 65% (p < or = 0.01). The decreases ranged from -52 to -60% with multiple doses of finasteride 5 mg once a day (p < or = 0.01). As in the placebo group, there was no effect of Permixon on the serum dihydrotestosterone level. No significant difference was detected between finasteride and Permixon or between finasteride and placebo with respect to serum testosterone, except on days 3 and 6, respectively (p < or = 0.05). However, the corresponding serum testosterone levels remained within the normal ranges. These data confirm the efficacy of finasteride as inhibitor of 5 alpha-reductase.(ABSTRACT TRUNCATED AT 250 WORDS)

Comparison of finasteride (Proscar), a 5 alpha reductase inhibitor, and various commercial plant extracts in in vitro and in vivo 5 alpha reductase inhibition.

Human prostate was used as a source of 5 alpha reductase. Compounds were incubated with an enzyme preparation and [3H]testosterone. [3H]-dihydrotestosterone production was measured to calculate 5 alpha reductase activity. IC50 values (ng/ml) were finasteride = 1; Permixon = 5,600; Talso = 7,000; Strogen Forte = 31,000; Prostagutt = 40,000; and Tadenan = 63,000. Bazoton and Harzol had no activity at concentrations up to 500,000 ng/ml. In castrate rats stimulated with testosterone (T) or dihydrotestosterone (DHT), finasteride, but not Permixon or Bazoton, inhibited T stimulated prostate growth, while none of the three compounds inhibited DHT stimulated growth. These results demonstrate that finasteride inhibits 5 alpha reductase, while Permixon and Bazoton have neither anti-androgen nor 5 alpha reductase inhibitory activity. In addition, in a 7 day human clinical trial, finasteride, but not Permixon or placebo, decreased serum DHT in men, further confirming the lack of 5 alpha reductase inhibition by Permixon. Finasteride and the plant extracts listed above do not inhibit the binding of DHT to the rat prostatic androgen receptor (concentrations to 100 micrograms/ml). Based on these results, it is unlikely that these plant extracts would shrink the prostate by inhibiting androgen action or 5 alpha reductase.