Bhang has a active ingredient which is responsible for this, consumption of this generally causes dry mouth, increased heart rate, able to feel one's own heart beating faster, headache, anxiety etc Generally the effect of bhang decreases within the next day of consumption but if u hav taken it in a lmproperly diluted form then the symptoms persists longer. stay hydrated by regular intake of fluids in the form of fruit juice, buttermilk, green tea. Avoid going ouside since blurring of vision and panic attack should be absent while driving and if this persists longer consult a physician.