Overview
What is Rohypnol (Flunitrazepam)?
Rohypnol (flunitrazepam) is a very powerful benzodiazepine: it is approximately ten times more potent than diazepam. It produces intense sedation, muscle relaxation, and anterograde amnesia (inability to form new memories during the period it is active). This combination of effects is why it is both misused recreationally and used as a weapon.
On Kenyan streets it is known as "mchele" (the Swahili word for white rice, because the original tablets were small and white) or "date rape drug." NACADA has specifically identified it as the primary drug used to spike drinks in clubs and bars, where it is dissolved in a victim's beverage to cause sedation and enable sexual assault.
As a recreational drug, it is used at "Red Devil" parties and taken alongside alcohol or other substances for its intensely sedating and disinhibiting effect.
What it does to the brain and body
How does it work?
Why people use it
What draws people to it?
Recreational users seek its intense sedative and disinhibiting effects. Combined with alcohol, it produces a deep intoxication that some users describe as very pleasurable.
It is used criminally to incapacitate victims for sexual assault or robbery. The victim appears voluntarily intoxicated and often has no memory of what happened.
Some polydrug users take it specifically to intensify or modify the effect of other substances.
Short-term effects
What happens when someone uses it?
These effects can occur even with first-time or occasional use.
- Extreme sedation and loss of coordination within 15 to 30 minutes of ingestion
- Anterograde amnesia: inability to remember events during the period the drug is active
- Disinhibition, confusion, and impaired judgment
- Slurred speech and loss of muscle control
- Blackout periods with no memory formation
- In combination with alcohol: risk of respiratory depression and death
Long-term effects
What happens with regular or prolonged use?
- Physical and psychological dependence
- Cognitive impairment, particularly affecting memory
- Depression and anxiety
- Risk of repeated exposure to assault or exploitation due to impaired judgment while under the influence
Recognising a problem
Signs that use may have become a problem
These signs apply to the person using the substance and can also help family members or friends recognise when help is needed.
- Unexplained memory gaps after a social event where drinks were consumed
- Waking up in an unfamiliar place with no memory of how you got there
- Feeling significantly more intoxicated than the amount you drank should explain
- Physical signs of assault with no memory of the event
- Seeking rohypnol for recreational use or obtaining it without a prescription
Addiction and dependence
How addictive is it?
Rohypnol produces dependence through the same mechanism as other benzodiazepines, but at much lower doses due to its high potency. Withdrawal can be medically serious.
The risk for victims of drink spiking is not addiction but the immediate danger of assault. Any unexplained gap in memory after drinking should be taken seriously.
Overdose and acute danger
When does it become immediately dangerous?
- Combination with alcohol: breathing suppression, coma, and death
- Deep unconsciousness from which the person cannot be woken
- Choking on vomit while unconscious
- If someone is unconscious after drinking and cannot be woken, place them in the recovery position and call 999 immediately
Withdrawal
What happens when someone tries to stop?
Who is most affected
Groups particularly at risk in Kenya
Women in nightlife settings are at particular risk of having their drinks spiked. Nairobi's clubs, bars, and parties are documented sites of rohypnol-facilitated assault.
Recreational users tend to be young adults in urban settings who use it alongside alcohol and other drugs.
Polydrug users in the heroin-using community use it as part of their substance combination.
In Kenya
What the data says about Kenya
NACADA specifically names rohypnol ("mchele") as the primary drink-spiking drug in Kenya. It has been documented in clubs in Nairobi and Mombasa.
Nation Africa documented it at 14.7% of prescription drug misuse cases. The 2026 NACADA wastewater analysis found it at 8% of prescription drug detections.
Drink spiking with rohypnol for sexual assault is a documented crime pattern in Kenya. Victims often do not report because of memory gaps and stigma.
Harm reduction advice for nightlife settings: never leave your drink unattended, do not accept drinks from strangers, and if you feel significantly more intoxicated than expected, tell a trusted person immediately.
Across East and Central Africa
How is it used in the wider region?
| Country | Local name(s) | Context and notes |
|---|---|---|
| South Africa | Roofie, Date rape drug | Significant drink spiking problem documented in South African nightlife. The term "roofied" is widely understood. Sexual assault cases involving rohypnol are documented by police and NGOs. |
| Uganda | Flunies, Mchele | Misuse and drink spiking documented in Kampala nightlife. |
| Tanzania | Mchele, Roofie | Documented in Dar es Salaam. Cases of drink spiking reported to police. |
| Nigeria | Rohypnol, Ruffie | Documented in Nigerian drug surveys. Drink spiking cases reported in Lagos and Abuja. |
Getting help
Where to turn in Kenya
NACADA Helpline
Free, confidential counselling and referral to treatment centres near you. Available 24 hours a day.
Mathari National Hospital
Kenya's main national psychiatric and substance use treatment facility in Nairobi. Inpatient and outpatient services.
County referral hospitals
Every county in Kenya has a mental health and substance use service. Ask at your nearest hospital or health centre.
NACADA Helpline
For support with substance use or to report a concern about drink spiking.
Gender Violence Recovery Centre
Support for survivors of sexual assault, including cases involving drug-facilitated assault. Nairobi Women's Hospital.
Sources
References
- The Star. (2026, May 15). Commonly abused prescription drugs in Kenya.
- Nation Africa. (2021, June 26). Ya-Ba, happy water, meow: list of drugs abused by the youth keeps growing.
- Nation Africa. (2023, January 25). High for three days: Kenya's prescription drugs abuse craze.
- National Authority for the Campaign Against Alcohol and Drug Abuse (NACADA). (2021). Assessment of Emerging Trends of Drugs and Substance Abuse in Kenya 2021. Nairobi: NACADA.