Yes. As with any foreign compound introduced into the body it is possible that undesirable effects may arise, which are typically brought on when too much is consumed. It is important to note that the effects THC produces on the body and mind are temporary and will vary between people. Some effects may include an onset of anxiety, paranoia, panic-attacks, loss of concentration, lethargy, reduced motor skills and reaction times. Such effects can be uncomfortable and cause alarm. Most are temporary but seek medical attention if you are experiencing prolonged unpleasant effects.