Cerebrospinal fluid prostaglandins after systemic dipyrone intake.
OBJECTIVE
The object of this study was to evaluate the time course of thromboxane B2 and prostaglandin E2 concentrations in cerebrospinal fluid after oral administration of dipyrone (INN, metamizole).


METHODS
A single 1.0 gm oral dose of dipyrone was given to consenting patients undergoing elective diagnostic lumbar puncture 0.5, 1, 1.5, 2, 4, 6, 8, or 12 hours before the tap.


RESULTS
For thromboxane B2 a time decrease in cerebrospinal fluid concentration was apparent. In contrast, for prostaglandin E2 cerebrospinal fluid levels no consistent trend was observed.


CONCLUSIONS
A time-related decrease in cerebrospinal fluid thromboxane B2 level was noted in patients receiving dipyrone. Thirty minutes after dipyrone intake cerebrospinal fluid thromboxane B2 levels already tended to be lower than those seen in patients with neurologic diseases who were not receiving dipyrone. These results are consistent with the hypothesis that dipyrone acts in the central nervous system by inhibition of particular prostanoids.
Department of Medicine, Hadassah University Hospital, Jerusalem, Israel.
M
M
Levy
K
K
Brune
E
E
Zylber-Katz
O
O
Cohen
Y
Y
Caraco
G
G
Geisslinger
D000284:Administration, Oral; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000008:administration & dosage / Q000494:pharmacology*; D002648:Child; D002675:Child, Preschool; D015232:Dinoprostone / Q000134:cerebrospinal fluid*; D004177:Dipyrone / Q000008:administration & dosage / Q000494:pharmacology*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D013929:Thromboxane B2 / Q000134:cerebrospinal fluid*; D013997:Time Factors
D000894:Anti-Inflammatory Agents, Non-Steroidal; D013929:Thromboxane B2; D004177:Dipyrone; D015232:Dinoprostone