Extra volunteers are on standby for the 30% hike due to Dublin rape crisis centre (DRCC), which urged anyone affected to ring 1800 778 888.
The publications coincided with the launch of the centre's annual report, which revealed more than 9,000 genuine calls were made to the 24-hour helpline in 2011.
The figure included almost 4,000 first-time callers, an 18% increase on the figure from 2010.
Ellen O'Malley-Dunlop, chief executive of the DRCC, said despite cuts there is always a trained person at the end of the line to listen.
"You can come through these traumas with the support that is there and you can get on with the rest of your life," she said. "Talking does help the feelings to fade."
The charity, which has launched a new awareness campaign, called on health chiefs not to cut its funding further as it supports more men and women than ever and aims to change the long shelf life of attitudes to rape and sexual abuse in Ireland.
It revealed the number of clients seeking therapy for childhood sexual abuse has jumped by a fifth in less than a decade, with spikes after the release of the Ferns, Ryan, Murphy and Cloyne reports into clerical abuse.
Ms O'Malley-Dunlop said more cases need to go to court and called on the Director of Public Prosecutions to tell victims why a criminal case is not brought.
She also warned one of the most disturbing stories from the annual report is the evidence of the high levels of violence being experienced by adults and children.
Almost nine out of 10 adults who were raped or assaulted also suffered physical violence, psychological abuse, harassment, intimidation and threats to kill, with the figure rising to 95% for survivors of childhood sex abuse.
The charity said hardcore pornography is having a dangerous, damaging effect on people, their relationships and lives.
"The easy access to hardcore pornography further fuels attitudes of objectification of both men and women, and leads to unimaginable dehumanisation of both the victims and the perpetrators themselves of these crimes," Ms O'Malley-Dunlop said.