Depressants Alcohol, consumed voluntarily, is the most commonly used drug involved in sexual assaults. Since the mid-1990s, the media and researchers have also documented an increased use of drugs such as
flunitrazepam and
ketamine to facilitate sexual assaults in the context of dating. Other drugs that have been used include
hypnotics such as
zopiclone,
methaqualone, and the widely available
zolpidem (Ambien);
sedatives such as
neuroleptics (anti-psychotics),
chloral hydrate, and some
histamine H1 antagonists; common recreational drugs such as
ethanol,
cocaine, and less common
anticholinergics,
barbiturates,
opioids,
PCP,
scopolamine; nasal spray ingredient
oxymetazoline; and certain
GABAergics like
GHB.
Gamma-Butyrolactone is also often referred to as being used in sexual assaults.
Alcohol study ranking various drugs (legal and illegal) based on statements by drug-harm experts. This study rated alcohol the most harmful drug overall, and the only drug more
harmful to others than to the users themselves.Researchers agree that the drug most commonly involved in drug-facilitated sexual assaults is alcohol, Alcohol consumption is known to have effects on
sexual behavior and
aggression. During social interactions, alcohol consumption causes more biased appraisal of a partner's sexual motives while impairing communication about and enhancing misperception of sexual intentions, effects exacerbated by peer influence about how to behave when drinking. The effects of alcohol at the point of
forced sex commonly include an impaired ability to rectify misperceptions and a diminished ability to resist sexual advances and aggressive sexual behavior. In 2023,
California passed Assembly Bill 1013 which requires
bars and
nightclubs to provide
drug checking strips for drinks. A similar bill is also being considered in
Olympia, Washington for 2026.
Alcohol in campus rape The increase of sexual assaults on college campuses has been attributed to the social expectations of students to participate in alcohol consumption;
social norm dictates that students drink heavily and engage in casual sex. Various studies have concluded the following: • On average, at least 50% of college sexual assault cases are associated with alcohol use. • In violent incidents recorded by the police in which alcohol was a factor, about 9% of the offenders and nearly 14% of the victims were under age 21.
Benzodiazepines Benzodiazepines (
tranquilizers), such as
Valium,
Librium,
Klonopin,
Xanax, and
Ativan, are prescribed to treat
anxiety,
panic attacks,
insomnia, and several other conditions, and are also frequently used recreationally. Benzodiazepines are often used in drug-facilitated sexual assaults, with the most notorious being
flunitrazepam (chemical name) or
Rohypnol (proprietary or brand name), also known as "roofies," "rope," and "roaches." The benzodiazepines
midazolam and
temazepam were the two most common benzodiazepines utilized for date rape. Benzodiazepines can be detected in urine through the use of drug tests administered by medical officials or sold at pharmacies and performed at home. Most tests will detect benzodiazepines for a maximum of 72 hours after it was taken. Most general benzodiazepine detection tests will not detect Rohypnol: the drug requires a test specifically designed for that purpose. One new process can detect a 2 mg dose of Rohypnol for up to 28 days post-ingestion. Other tests for Rohypnol include blood and hair tests. Because the most commonly used drug tests often yield false negatives for Rohypnol, experts recommend use of
gas chromatography-
mass spectrometry analysis. In one 2002 survey of 53 women who used Rohypnol recreationally, 10% said they were physically or sexually assaulted while under its influence. Rohypnol is believed to be commonly used in drug-facilitated sexual assaults in the United States, the United Kingdom, and throughout Europe, Asia and South America. Although Rohypnol's use in drug-facilitated sexual assaults has been covered extensively in the news media, researchers disagree about how common such use actually is. Law enforcement manuals describe it as one of the drugs most commonly implicated in drug-facilitated sexual assaults. but the taste can be masked when mixed in a drink. GHB is used recreationally to stimulate
euphoria, to increase sociability, to promote libido and lower inhibitions. It is sold under names such as Rufies, Liquid E and Liquid X. It is usually taken orally, by the capful or teaspoon. From 1996 to 1999, 22 reports of GHB being used in drug-facilitated sexual assaults were made to the United States
Drug Enforcement Administration. A 26-month study of 1,179 urine samples from suspected drug-facilitated sexual assaults across the United States found 4% positive for GHB.
Psychedelics Ayahuasca Ayahuasca has been used in some ayahuasca retreats to sexually abuse ayahuasca tourists.
3,4-Methylenedioxymethamphetamine (MDMA) MDMA is an
empathogen. Although it is not sedating like other date rape drugs, it has been used to facilitate sexual assault. It can increase disinhibition and sexual desire. Often Ecstasy is combined with amphetamines or other drugs. ==Detection==