It's not okay to pressure someone into having another drink, says Whanganui District Health Board.
The DHB is encouraging people to drink alcohol responsibly over the Christmas and New Year period.
It is urging people to actively encourage drinking moderately.
"Show support and back your friends who are trying to ease up on the drink this summer," said the DHB's alcohol and other drugs health promotion officer, Chester Penaflor.
"If you know someone who is trying to reduce their drinking, please support them. It is socially acceptable to say 'no more' and to not be pressured to have 'another one'."