| Disease | AN INVESTIGATION TO OBJECTIFY THE PHARMACODYNAMIC EFFECTS OF DIFFERENT DOSAGES OF A COMMERCIALLY AVAILABLE PLANT EXTRACT MIXTURE OF VALERIAN AND HOPS BY MEANS OF THE QUANTITATIVE TOPOGRAPHICAL EEG (QEEG) IN HEALTHY YOUNG ADULTS IN COMPARISON TO
PLACEBO. TWO DIFFERENT DOSAGES WERE APPLIED IN TWO SINGLE-BLIND, CROSS-OVER DESIGNED OBSERVATION TRIALS IN 12 HEALTHY VOLUNTEERS (1ST DOSAGE: 500 MG VALERIAN AND 120 MG HOPS, VERSUS PLACEBO, FIRST CLINICAL TRIAL; 2ND DOSAGE: 1500 MG VALERIAN AND
360 MG HOPS, VERSUS PLACEBO, SECOND CLINICAL TRIAL). QEEG WAS RECORDED BIPOLARLY FROM 17 SURFACE ELECTRODES ACCORDING TO THE 10:20 SYSTEM AND ANALYSED USING THE FAST FOURIER TRANSFORMATION PRIOR TO, 1, 2 AND 4 HOURS AFTER DRUG INTAKE IN THE
RECORDING CONDITIONS EYES OPEN, EYES CLOSED AND UNDER MENTAL DEMAND. THE EEG-SPECTRA WERE CUT INTO SIX FREQUENCY BANDS. BOTH RESTING CONDITIONS (EYES OPEN AND EYES CLOSED) WERE ANALYSED TOGETHER. AFTER APPLICATION OF THE LOW DOSAGE QEEG POWER
CHANGES REMAINED MORE OR LESS WITHIN PLACEBO RANGE FOLLOWING THE NORMAL CIRCADIAN RHYTHMICS, EXCEPT FOR A TENDENTIOUS REDUCTION OF ALPHA- AND BETA-POWER 4 H AFTER DRUG INTAKE. THE HIGH DOSAGE LED TO POWER INCREASES IN DELTA, DECREASES IN ALPHA
AND A WEAK DECREASE IN BETA-POWER. UNDER MENTAL PERFORMANCE ONLY WEAK DIFFERENCES TO PLACEBO WERE SEEN WHICH ARE NOT DISCUSSED HERE. IN THE CPT (COMPLETION OF COMPLICATED ADDITIONS AND SUBTRACTIONS) THE CONCENTRATION AND PERFORMANCE CAPABILITY
WERE HARDLY INFLUENCED. HOWEVER, A MINIMAL INCREASE OF MEAN ANSWER TIME AND MEAN OK TIME (TIME FOR CORRECT ANSWERS) WAS OBSERVED 4 HOURS AFTER INTAKE OF 2 TABLETS AND 1 HOUR AFTER 6 TABLETS OF VALERIAN AND HOPS MIXTURE WITH MORE PRONOUNCED
CHANGES AFTER THE LOW DOSAGE RATHER THAN THE HIGH ONE. |