Charlie takes an "intelligence pill" and claims it has helped him invent a way for spiders to speak to cats. The researchers quickly diffuse this claim and credit the placebo effect for increasing Charlie's self-confidence, arrogance, and perceived intelligence with no actual effects on his intelligence.
Emma is very "sick" after not taking her pills for a few hours. When the pharmacist gives her the pills, she immediately feels better. The pharmacist later reveals that the pills are actually just sugar tablets and that Emma's illness is all in her head.