Drug-facilitated sexual assault (DFSA) is a form of sexual violence where alcohol, drugs, medication, or other substances are used to impair a person’s ability to consent to sexual activity. While DFSA is often associated with nightlife settings, it can also occur within relationships and forms of domestic abuse.
Domestic abuse is a pattern of behaviour used to control, threaten, manipulate, or harm a partner, ex-partner, or family member. It can include physical violence, sexual abuse, emotional abuse, coercive control, stalking, and financial abuse. In some cases, perpetrators use alcohol or drugs as a tool to facilitate sexual assaults, increase control, or reduce a victim’s ability to resist, remember, or report what has happened.
Understanding Consent
Consent means having the freedom and capacity to choose.
A person cannot consent if they are asleep, unconscious, heavily intoxicated, affected by drugs, or otherwise unable to make an informed choice. If sexual activity happens when someone does not have the ability to choose, that is not consent.
Some victims may later be told they agreed to sexual activity but have no memory of doing so. If they did not have the capacity to make that decision, consent was not present.
If something sexual happened without your consent, that is a criminal offence.
Why DFSA Can Be Difficult to Recognise
Victims of DFSA often describe feelings of confusion, uncertainty, and self-doubt. They may experience memory loss, fragmented memories, or periods of time they cannot account for.
When DFSA occurs alongside domestic abuse, these feelings can be intensified. Perpetrators may use manipulation, coercion, threats, or gaslighting to make victims question their own experiences.
Sexual assault and rape do not always involve strangers. They can involve intimate partners, ex-partners, family members, friends, acquaintances, or people in positions of trust.
Sometimes these situations involve planning, control, or more than one person. Others may have been present, involved, or encouraging what happened, making it even harder for victims to recognise what has occurred at the time.
Potential indicators of DFSA within an abusive relationship may include:
- Unexplained gaps in memory following drinking or taking medication.
- Feeling unusually intoxicated after consuming a small amount of alcohol.
- Waking up confused, disoriented, or with injuries that cannot be explained.
- Suspecting sexual activity has occurred but being unable to remember events.
- A partner controlling access to medication, alcohol, or other substances.
- Being pressured to consume alcohol or drugs despite discomfort.
- Feeling unsafe, frightened, or unable to refuse sexual activity.
You do not need proof, certainty, or a clear memory to be taken seriously, nor do you need to understand exactly what happened or know who was involved before seeking support. If something does not feel right, that alone is enough reason to talk to someone. You will not be judged for trusting someone or for the situation you were in. Many people only realise much later that something was wrong, and no matter how much time has passed, you can come forward and still be listened to, supported, and taken seriously.
You can speak to someone confidentially without involving the police. Anyone who believes they may have been subjected to DFSA should seek medical attention as soon as possible. Some substances leave the body quickly, meaning early forensic evidence can be important. Victims do not need to decide immediately whether to report the incident to police in order to access healthcare and support services.
Support is available through specialist sexual violence and domestic abuse organisations, healthcare professionals, and the police. Friends, family members, schools, employers, and community organisations also play an important role in recognising concerns and encouraging individuals to seek help safely.
Reporting to the Police
Choosing whether to report is your decision. You can speak to support services first and decide later what you want to do.
If you choose to report:
- You will be listened to, treated with respect, and taken seriously.
- You do not need to come forward with a complete story or full memory.
- Specially trained officers will support you throughout the process.
- The focus will be on what may have been done to you, not on judging your behaviour or decisions.
- You will be involved in decisions about what happens next.
- There is no right or wrong time to report.
Drug-facilitated sexual assault is a real, serious, and often hidden form of sexual offending that can occur both within and outside intimate relationships.
Victims may not realise they have been harmed. The use of alcohol or other substances can affect memory, awareness, and a person’s ability to recognise what has happened, sometimes for a significant period of time.
If someone seems unsure about an experience, feels that something is not right, or discloses concerns about memory loss, sexual activity they cannot explain, or controlling behaviour within a relationship, they should be encouraged to seek support.
No one should feel they must be certain before asking for help. If something does not feel right, support is available. You do not have to work it out alone.
Report it
If you would like to report it or know someone who is, and there’s an emergency that’s ongoing or life is in danger, call 999 now.
If you have a hearing or speech impairment, use our textphone service 18000 or text us on 999 if you’ve pre-registered with the emergencySMS service.
Other ways to report: