Administration of Drugs for a Sexual Purpose

Author: Dee Giannopoulos

Practice area: Sex Offences

Dee is a Director at Doogue + George and an LIV Accredited Criminal Law Specialist, recognised by Doyle's Guide as a Leading Criminal Defence Lawyer in Victoria (2026), with extensive experience in adult and child sex offence matters. Her depth of experience in this area means clients receive accurate, considered advice.

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Dee authored this content and last revised it for accuracy on 5th August 2026.

What is the offence of Administration of Drugs for a Sexual Purpose?

Administration of an Intoxicating Substance for a Sexual Purpose is a Victorian offence under section 46 of the Crimes Act 1958. It is committed when a person gives another person an intoxicating substance, causes them to take one, or gets somebody else to give it to them, intending both that it will impair that person's capacity to consent to a sexual act and that it will make a sexual act easier.

Key points

What the prosecution must prove: That you administered an intoxicating substance, caused the person to take one, or caused someone else to administer it, and that you held both of the intentions the section requires.
What the law covers: The section says an intoxicating substance includes any substance that affects a person's senses or understanding. It is not limited to illegal drugs.
Usual court level: County Court

The maximum penalty for Administration of Drugs for a Sexual Purpose is level 5 imprisonment (10 years maximum).

Common defences may include mistaken identity, a factual dispute, no substance was administered, the person took it of their own accord, and you did not hold one or both of the intentions the section requires.

Have you been accused of Administration of Drugs for Sex? Ask us your legal questions in confidence. Ask about your rights when dealing with the Police. Should you plead guilty or not guilty?

We are defence lawyers who specialise in allegations such as Administration of a Drug for a Sexual Purpose and we can confidently answer your questions. We also know how to run successful defences and can prepare the best defence strategy for you.

Police interview

Anything you say can be used against you. The danger in this charge is that the conduct itself, is often not in dispute at all. What is in dispute is what you meant by it, and that is what the interview is aimed at.

You do not have to answer questions beyond giving your name, address and date of birth. Speak to a lawyer before the interview starts. We can attend the police station with you.

Pleading not guilty

Section 46 requires the prosecution to prove intention beyond reasonable doubt.

If you instruct us to defend the charge, we will examine the brief and consider matters such as:

Whether you administered anything at all, or whether the person took it themselves.

Whether the prosecution can prove you intended to impair the person’s capacity to consent.

Whether the prosecution can prove the second intention, that the substance would facilitate a sexual act.

Our lawyers appear regularly in the Magistrates’ and County Courts in sexual offence matters, where the case often rests on inference about intention.

Pleading guilty

Get advice before pleading guilty. Section 46 is not a category 1 or category 2 offence under the Sentencing Act 1991, and no mandatory minimum applies, so the full range of sentencing options remains open.

Where you decide to plead guilty, we can negotiate with the prosecution about the summary of offending and about the charges themselves, particularly where section 46 sits alongside more serious counts, and prepare the plea material the court will want to see.

Contact an expert in charges of Administration of Drugs for Sex on (03) 9670 5111.
We provide a free first phone conference.
Download our free booklet to learn more about the Investigation and Court process.

Which court will the case be heard in?

Administration of Drugs for a Sexual Purpose is an indictable charge which means that all cases are heard in the County Court.

Examples of Administration of Drugs for a Sexual Purpose

You’re in a bar and you meet someone. You buy her so many drinks she passes out. Your intention was that the other person become so drunk that they could not resist later having sex with you.
You see someone at a club that you think your best friend would like to have sex with. You put Rohypnol in the person’s drink so that they won’t be able to resist your friend’s sexual advances.

One of our clients was accused of Administering Drugs for Sex after a small vial of GHB was found in his possession. The charges did not proceed as the Police could not prove that our client had any intention to administer GHB to anyone.

What is the legal definition of Administration of Drugs for a Sexual Purpose?

The legal definition of Administration of Drugs for Sex is when a person (A) gives a drug, or causes another person (C) to give a drug, to someone else (B) intending that the drug:

will impair person (B)’s ability to give, withhold or withdraw consent to taking part in a sexual act; and
will facilitate person (B) taking part in a sexual act with person A or another person.

Legislation

The section that covers this offence is section 46 of the Crimes Act 1958:

Administration of an Intoxicating Substance for a Sexual Purpose
A person (A) commits an offence if—
A—
administers an intoxicating substance to another person (B); or
causes B to take an intoxicating substance; or
causes another person (C) to administer an intoxicating substance to B; and
A intends that the intoxicating substance—
will impair B’s capacity to give, withhold or withdraw consent to taking part in a sexual act; and
will facilitate B taking part in a sexual act with A or another person.
A person who commits an offence against subsection (1) is liable to level 5 imprisonment (10 years maximum).
In this section—”intoxicating substance” includes any substance that affects a person’s senses or understanding.¹

Elements of the offence

A person may be found guilty of this charge if the following elements are satisfied beyond reasonable doubt:

The accused administered an intoxicating substance to another person (V); or
The accused caused the person (V) to take an intoxicating substance; or
The accused caused another person (P) to administer an intoxicating substance to V; and
The accused intended for the intoxicating substance to impair V’s capacity to give, withhold or withdraw consent to taking part in a sexual act; and
The accused intended for the intoxicating substance to facilitate V taking part in a sexual act with the accused or another person.

What are possible defences to an Administration of Drugs for Sex charge?

Possible defences include:

mistaken identity

a factual dispute about what happened

that no substance was administered

that the person took the substance of their own accord

that you did not intend to impair their capacity to consent

that you did not intend to facilitate a sexual act

Duress

The prosecution must prove every element beyond reasonable doubt.

You should ring us and discuss your case if you have been charged. Whether to plead guilty or not guilty has major implications for you, and the decision should be made after proper discussion with a criminal lawyer.

Questions in cases like this

How do they prove you drugged somebody?
How do they prove you intended to have sex?
How do they prove you intended to make the other person incapable of resisting sex?

Maximum penalty for section 46 of the Crimes Act 1958

The maximum penalty for this offence is 10 years imprisonment.

The maximum sentence is reserved for the worst example of the charge. Therefore not everyone charged with this offence gets that penalty.

What can you be sentenced to for this charge?

As with all sexual offences, this is a very serious offence that normally has a prison term attached to it if you are found guilty.

FAQs for Administration of Drugs for a Sexual Purpose

What is administration of drugs for a sexual purpose in Victoria?

Administration of Drugs for a Sexual Purpose is an offence under section 46 of the Crimes Act 1958. The offence involves giving an intoxicating substance to another person (or causing them to take it, or causing someone else to administer it) intending that the substance will impair the person’s capacity to give, withhold or withdraw consent to a sexual act and will facilitate a sexual act.

What are the penalties for administration of drugs for a sexual purpose in Melbourne?

Penalties for administration of drugs for a sexual purpose in Melbourne vary depending on the circumstances, prior history, and seriousness of the allegations. The maximum penalty for an offence against section 46 is level 5 imprisonment, which carries a maximum of 10 years.

Do I need a lawyer if charged with administration of drugs for a sexual purpose?

Yes, if you are charged with administration of drugs for a sexual purpose in Victoria, it is vital to seek legal advice. An experienced criminal lawyer can guide you through interviews, evidence, and court appearances.

Can administration of drugs for a sexual purpose charges be withdrawn before trial?

Yes, charges of administration of drugs for a sexual purpose may sometimes be withdrawn before trial if the prosecution evidence is weak. Defence lawyers often negotiate with prosecutors to discontinue weak cases.

What defences apply to administration of drugs for a sexual purpose charges in Victoria?

Possible defences include that the accused did not drug anybody, that there was no intention to have sex with the other person, or that there was no intention to make the other person incapable of resisting sex. Other defences may be available depending on the circumstances.

Does administration of drugs for a sexual purpose lead to a criminal record in Melbourne?

Yes, a conviction for administration of drugs for a sexual purpose will normally appear on your criminal record in Victoria. Skilled legal representation can help avoid or minimise the impact.

Can I get bail for administration of drugs for a sexual purpose charges in Victoria?

Bail can usually be sought if charged with administration of drugs for a sexual purpose. Success depends on the seriousness of the charge and your personal circumstances. Lawyers prepare strong bail applications to maximise release chances.

What does “intoxicating substance” mean?

Section 46 defines “intoxicating substance” to include any substance that affects a person’s senses or understanding. Whether a substance falls within that definition and what effect it had (or was intended to have) can be relevant to proving the offence.

Do you represent clients for administration of drugs for a sexual purpose in Melbourne courts?

Yes, Doogue + George regularly represent clients charged with administration of drugs for a sexual purpose in Melbourne and regional courts. Our team provides expert defence and tailored strategies.

What experience do Doogue + George have with administration of drugs for a sexual purpose cases?

Doogue + George Defence Lawyers have extensive experience with administration of drugs for a sexual purpose cases, including high-profile matters. We bring decades of expertise to defending clients in Victoria.

_{[1] Australian legal Information Institute. “Crimes Act 1958 – Section 46: Administration of an intoxicating substance for a sexual purpose.” Classic.Austlii.edu.au. http://classic.austlii.edu.au/au/legis/vic/consol_act/ca195882/s46.html (accessed June 1, 2020).}

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