Whoonga (iwunga): what it is, its symptoms and side effects
Whoonga is the KwaZulu-Natal street name for heroin mixed with other powders and smoked on dagga.
In this article
Its signs are heroin’s signs: drowsiness, weight loss and sickness every few hours without it. Renewed Life Center in Lakeside, Cape Town, treats whoonga dependence in a standard two-month residential programme, starting with medical detox where it is needed.
What is whoonga?
Whoonga, the drug also called unga, is a heroin-based street mixture, spelled wunga in isiZulu and often written iwunga or unga. It is the KZN name for what Gauteng calls nyaope: SACENDU describes both as “street names for heroin, often mixed with other regulated and unregulated substances”. A 2021 forensic paper in the South African Journal of Science put a dose of nyaope at R20 to R30.
Most people smoke it rolled into a joint of dagga or tobacco. Among people treated for heroin in KwaZulu-Natal in July to December 2025, smoking was the most common route, at 80%, according to SACENDU, and heroin and opiates were the main drug for 6% of people entering treatment in the province.
Physical symptoms of whoonga use
The physical signs of whoonga are the signs of heroin: a short calm rush, heavy eyelids and nodding off, then sickness within hours as it wears off. Families notice:
- weight loss and little interest in food;
- drifting in and out of a conversation, pinned pupils, slow speech;
- sweating, a runny nose, cramps and diarrhoea in the mornings until the next smoke;
- needle marks if it has moved to injecting.
Psychological and social effects
Between doses come anxiety, irritability and low mood; once the next joint is lit, calm. Within weeks the day is organised around getting the next dose, and that is when phones, cash and things from the house start to go missing. Informants in a Durban township study published in 2014 described whoonga as highly addictive and said people as young as 14 use it.
Long-term side effects of whoonga
Long-term use brings weight loss, chest infections, broken sleep, depression, and for those who inject, damaged veins, abscesses and shared-needle infections such as HIV and hepatitis C. The 2021 forensic paper adds damaged heart valves, liver failure and kidney disease among the harms of heroin use.
The deadliest risk comes after a break. Someone who stopped in jail or after a detox has lost tolerance, and the old dose can stop their breathing: the WHO and UNODC name recent abstinence as “a major risk factor for fatal opioid overdose”. If someone cannot be woken or is barely breathing, call 10177, or 112 from a cellphone.
Does whoonga contain ARVs?
People in Durban and Soweto say it does, usually efavirenz, but laboratory tests of real samples have not found antiretrovirals. The two kinds of evidence point different ways:
| Study | What it found |
|---|---|
| Grelotti and colleagues, Durban township, 2014 (interviews) | 17 of 22 informants raised whoonga as a community problem, and informants believed it contains ARVs, notably efavirenz |
| Rough and colleagues, Soweto, 2014 (interviews) | HIV-positive adults said antiretrovirals, likely efavirenz, are crushed, mixed with illicit drugs and smoked |
| Forensic laboratory, Gauteng, 2021 | Efavirenz and nevirapine not identified in real nyaope samples |
| University of Pretoria, Tshwane, 2024 | 62 samples: opioids found, no antiretrovirals detected |
Both laboratory studies tested nyaope from Gauteng, not whoonga from KZN, so the question is open. The rumour still does harm: Grelotti’s team warned that whoonga use may hurt adherence to HIV treatment and could breed ARV resistance, and the Soweto interviews describe medication stolen from patients. If you take antiretrovirals and use whoonga, tell us on the first call, because a safe detox is planned around every medicine in the picture.
Withdrawal symptoms of whoonga
Whoonga withdrawal follows the heroin clock: it can begin as early as 4 hours after the last dose, peaks within 48 to 72 hours and subsides after about a week, according to the MSD Manual. Expect cramps, chills, sweating, diarrhoea, aching muscles, yawning and no sleep, then craving that outlasts the sickness by weeks. If alcohol or pills are used as well, do not stop suddenly on your own; message us first. The full timeline is on our page on heroin withdrawal.
How is whoonga addiction treated?
Whoonga is treated in two steps: a medical detox to get through withdrawal safely, then months of therapy on what the drug was covering. At our house in Lakeside, close to Muizenberg beach, that runs as one plan:
- The first month, living with us: a medical assessment by our GP, Dr John Wulz, detox where it is needed, then one-to-one therapy typically three times a week, groups, and a 12-step meeting every evening.
- The second month goes after the reason: CBT and DBT for craving and urges, schema therapy for old patterns, EMDR for trauma. Ruby Weber, our psychologist, has more than 20 years in the addictions field and leads the dual diagnosis work.
From Durban, Cape Town is a short direct flight, and it puts distance between the person and the people who sell whoonga. Admission can be immediate and typically happens within three days of first contact.
A relative can start the conversation. Tell us what is being smoked, for how long and what medication is involved, and we will say whether a medical detox is needed.
Is whoonga illegal?
Yes. The street name cannot be listed in law, but heroin is listed in Part III of Schedule 2 of the Drugs and Drug Trafficking Act 140 of 1992 as an “undesirable dependence-producing substance”, so possessing or selling whoonga is a criminal offence because of the heroin in it.
FAQs about whoonga
Close to it. Both are heroin-based mixtures smoked on dagga; whoonga is the KwaZulu-Natal name and nyaope the Gauteng one. Our page on nyaope covers the Gauteng side.
It often comes with dagga from the start, because it is smoked on it. In KwaZulu-Natal in July to December 2025, alcohol (44%) and crack or cocaine (10%) were the main drug for more people entering treatment than heroin (6%), and many people use more than one.
Lies, missing money and fear of the next phone call wear families down. Family therapy can start before the person agrees to treatment, so relatives do not have to wait for that yes to get help themselves.
Narcotics Anonymous South Africa runs meetings in KwaZulu-Natal, in person and online, and they are free. They work best alongside treatment for the withdrawal and what sits under the use.
A urine test usually shows heroin for about 1 to 3 days after occasional use, and longer after daily use. Our page on how long drugs stay in your system gives the windows for each kind of test.
Sources
- Mthembi, Mwenesongole and Cole, nyaope analysis and profiling, South African Journal of Science (2021)
- SAMRC, SACENDU research update, July to December 2025
- Grelotti DJ et al., whoonga in a Durban township, AIDS and Behavior (2014)
- Rough K et al., whoonga and antiretroviral diversion in Soweto (2014)
- Visser, nyaope in the Tshwane District, University of Pretoria (2024)
- MSD Manual Professional Version: opioid toxicity and withdrawal
- UNODC and WHO, Opioid overdose: preventing and reducing opioid overdose mortality (2013)
- Drugs and Drug Trafficking Act 140 of 1992, Schedule 2
This article is general information, not medical advice.
If whoonga has a hold on someone you love, start with one message.
A free, confidential first conversation with a same-day reply. Detox where it is needed, then two months of treatment for the heroin and what sits under it, with admission typically within three days of first contact.
or call +27 79 880 0045
Calling about someone else? You do not need their permission to message us.
