<P> Child - resistant packaging or CR packaging is special packaging used to reduce the risk of children ingesting hazardous materials . This is often accomplished by the use of a special safety cap . It is required by regulation for prescription drugs, over-the - counter medications, Nicotine Containing Electronic Cigarette devices or Refill containers that can contain Nicotine EUTPD 36.7 pesticides, and household chemicals . In some jurisdictions, unit packaging such as blister packs is also regulated for child safety . </P> <P> The U.S. Consumer Product Safety Commission has stated in a press release that "There is no such thing as child - proof packaging . So you shouldn't think of packaging as your primary line of defense . Rather, you should think of packaging, even child - resistant packaging, as your last line of defense ." </P>

When did the usa make a law requiring child proof caps