Pfizer said on Tuesday it was recalling about a million packets of birth control pills in the United States because they may not contain enough contraceptive to prevent pregnancy.

The candymaker is unveiling Purple as its latest addition to the M&Ms cast of characters, but fans may be disappointed to find that she will not be coming to their candy packets.

Regulators in South Africa have recalled a batch of the popular Yaz Plus contraceptive pill, after a packaging mix-up which means the contraception could be potentially ineffective.