Hydatid disease of the lung mimicking a pericardial cyst.

We report a young girl who presented to us with chest discomfort and had a paracardiac mass on chest radiograph. Computerised tomographic (CT) scan of the thorax was suggestive of pericardial cyst. Hydatid serology was negative. The cyst was excised.

Neuropharmacological effects of ivermectin in mice.

Neuropharmacological effects (Spontaneous locomotor activity, forced locomotor activity and anticonvulsant activity) of invermectin were studied at 400, 800 and 1600 micrograms/kg (administered, subcutaneously). Spontaneous locomotor activity was reduced at all the dose levels but forced locomotor activity was slightly reduced at 800 and 1600 micrograms/kg. The drug did not exhibit any anticonvulsant potential at any of the dose levels studied.

Pharmacodynamic interactions of cypermethrin and centrally acting drugs in mice.

Cypermethrin a widely used insecticide of Pyrethroids (type II) group, was administered in mice at two dose levels (1/10 of LD50 i.e. 2.5 mg/kg and 1/5 of LD50 i.e. 5.0 mg/kg) and pharmacodynamic interactions of insecticide were studied with centrally acting drugs viz. pentobarbital sodium, amphetamine, pentylenetetrazole, acepromazine and analgin. Cypermethrin pretreatment potentiated the actions of pentobarbital and pentylene-tetrazole as evidenced by an increase in pentobarbital induced hypnosis and duration of pentylene-tetrazole induced chemoshock seizures. Tranquilizing action of acepromazine was potentiated but there was decrease in amphetamine influenced locomotor activity at both the dose levels. Cypermethrin pretreatment, however, did not have any pharmacodynamic interaction with analgin.