Ketamine symptoms | effects and warning signs

Ketamine symptoms can be easy to miss at first. The effects of a dose wear off within a few hours, and the first problems often seem to have nothing to do with the drug. Stomach pain, needing the toilet more often or gaps in memory can easily look like something else. With regular use, ketamine can affect the bladder, the brain and everyday life. Recognising these signs early makes it easier to act before the problems add up.

Ketamine is an anaesthetic that dulls pain and creates a sense of detachment from the body and surroundings. Hospitals use it for surgery and pain relief, and vets use it to anaesthetise animals. Unlike most anaesthetics, ketamine has little effect on breathing and tends to keep blood pressure up. That is why field hospitals and emergency services also use it where ventilators and heart monitors are scarce. Even in these settings, trained doctors give a measured dose of pharmaceutical-grade ketamine, made under strict controls, and monitor the patient closely.

Ketamine side effects as a street drug

Outside a hospital, ketamine usually comes as a white powder that you snort, although some people swallow or inject it. What you never know is how strong the ketamine is or what else is in the powder. If you combine ketamine with alcohol or other drugs, the side effects of ketamine become harder to predict. The ketamine side effects below relate to recreational use like this, from a single night out to regular use over months or years.

If you have questions about your own ketamine use or about a loved one, you can call us on +27 21 541 0643 for honest, confidential advice.

The effects of ketamine usually start within minutes of snorting it. At a low dose, ketamine effects can make you feel dreamy and relaxed, with sounds and colours distorted and time seeming to slow down. At a higher dose, the sense of detachment from your body becomes stronger. This is called dissociation, and it can make moving and speaking difficult. The most extreme form is the K-hole, in which awareness of your body and surroundings almost disappears, an experience that can be very frightening. Some users describe it as a near-death experience. With ketamine, the line between the effect you want and a K-hole is very thin. Even a fraction more can be enough to tip you into one.

Common short-term side effects

Alongside dissociation, a single dose of ketamine can cause:

• feeling sick or vomiting
• numbness, so that injuries go unnoticed
• a faster heartbeat and higher blood pressure
• poor coordination and slurred speech
• confusion, anxiety or panic
• memory gaps covering the time spent high
• losing control of your body, sometimes to the point of being unable to move

Short-term risks of ketamine

Most short-term risks come from the combination of numbness, confusion and limited control over your body. Because you do not feel pain properly, you may not notice falls, burns or other injuries. Ketamine can leave you unable to move while you are still aware of what is happening. If you vomit while lying in the wrong position, you can choke. Combined with alcohol, GHB or opioids, ketamine increases the risk of breathing problems and loss of consciousness. In a K-hole you cannot react to what is happening around you, which is dangerous in an unsafe place or among people you do not know well.

The long-term side effects of ketamine come with regular use, although bladder problems can start after a relatively short time. In the long term, ketamine side effects mainly affect the bladder and urinary tract, the stomach and liver, and the brain. Some of this damage can improve after stopping, but with continued use it can become permanent.

Ketamine bladder damage

Your bladder is often where ketamine damage shows first. Ketamine and the substances it breaks down into irritate the lining of your bladder. This can cause pain when urinating, a constant urge to go, blood in the urine and incontinence. The more often you use and the longer you go on, the more severe and lasting the damage can become. Over time your bladder can shrink and hold far less, and the damage can spread to your kidneys. In the most serious cases, bladder damage can require surgery.

Ketamine effects on the body

Ketamine effects on the body go beyond the bladder and usually develop gradually. Ketamine can damage the liver and the bile ducts, the small channels that drain fluid from the liver. K-cramps are severe, cramping stomach pains that are typical of heavy ketamine use. They are separate from bladder damage and are linked to ketamine's effect on the gut, liver and bile ducts. 

Frequent snorting can irritate and damage the inside of your nose. You may also lose your appetite, lose weight and sleep poorly.

Long-term effects of ketamine on the brain

concentration. With regular use, you may find it harder to remember recent conversations, follow a plan or think quickly. Low mood and depression are also common with long-term use. With heavy use, you may become paranoid or see and hear things that are not there, symptoms that can resemble a drug-induced psychosis. Memory and concentration can improve after stopping, although that can take a long time.

Signs of ketamine addiction usually develop slowly. Ketamine might start as something for a party or a festival, then become a weekend habit, then something for an ordinary evening. Each step can feel normal because you have already got used to the one before. Tolerance builds quickly with ketamine, so the same amount soon has less effect and use goes up. 

Ketamine addiction signs show up in three areas: what you do, how you feel and what you notice physically.

Changes in your behaviour

The first signs often show up in your behaviour:

• using more often, or in larger amounts, than you planned
• using alone or at home instead of only when you go out
• using ketamine to switch off at the end of the day
• trying to cut down or stop, and starting again
• keeping your use hidden from your partner, family or friends
• spending more on ketamine than you can afford
• carrying on despite pain or problems at work

Psychological symptoms of ketamine addiction

Psychological symptoms can include:

• thinking about ketamine often, or planning the next time
• strong cravings, especially in situations where you usually use
• restlessness, irritability or anxiety on days without it
• feeling flat or low when you are not using
• needing ketamine to feel calm
• losing interest in things you used to enjoy
• preferring the dreamlike world of ketamine to everyday life

Physical symptoms of ketamine addiction

Some ketamine addiction symptoms are physical and show that your body has got used to the drug:

• needing more ketamine for the same effect
• using ketamine to dull the stomach or bladder pain it causes
• sleeping badly on nights without ketamine

Using ketamine to dull the pain it causes is a pattern that is typical of this drug, and it can make stopping much harder.

The effects of ketamine addiction reach well beyond your health. Bladder and stomach pain can make work, travel and social plans harder to manage. More and more of your money can go on ketamine, and you may find you mostly spend time with people who also use. Your partner, family and friends may notice the changes before you do, such as cancelled plans, being short-tempered or long spells when you seem switched off. These effects tend to feed into each other, which is why the situation can feel hard to change.

If you are worried about your partner, child or another loved one, the signs of ketamine use can be hard to read. While they are high, you may notice a distant or blank look, unsteady movement, slurred speech or slow reactions. Ketamine use is easy to hide, so you may only find out by chance, for example when you come across powder or a rolled-up banknote. Over time, frequent trips to the toilet, stomach pain, withdrawing from family or money problems can point to regular use, especially if they keep happening. When a loved one is addicted, it affects you too. You can call us on +27 21 541 0643 to talk through what you are seeing and how to raise the subject.

Using ketamine does not automatically lead to addiction, but regular use makes it much more likely. The change is usually gradual and easy to miss: you use a little more often, plan your evenings around it or feel restless when you have none. Carrying on using ketamine despite bladder pain, K-cramps, memory problems or trouble in your relationships or at work is another clear sign. When you try to stop, you may also get ketamine withdrawal symptoms such as cravings, low mood and poor sleep. Once ketamine use has become an entrenched habit, these symptoms rarely go away on their own.

If you recognise these signs in yourself, you can call us on +27 21 541 0643 for a confidential conversation, or leave your details in the form below.

Ketamine can take you into a dreamlike state in which stress, low mood or painful memories feel far away. If you are dealing with depression, anxiety or trauma, that escape can become a reason to keep using. If you have ADHD, everyday noise and demands can feel overwhelming, and ketamine can quieten them for a while. When a mental health condition like this plays a part, we treat it alongside your addiction. An addiction combined with a mental health condition is called a dual diagnosis, and this is our specialism. Treatment takes place at our rehabilitation centre in South Africa, away from the people and places you associate with using.

Bladder problems during your treatment

Physical problems do not have to stand in the way of treatment. If ketamine has damaged your bladder, you may need the toilet often or be in pain during the day. Our team knows how to accommodate this during your stay, so you can focus on your recovery. When physical health problems occur alongside an addiction, this is known as comorbidity. Calm surroundings, sports facilities and a laundry service mean you can put your energy into your addiction treatment.

From addiction assessment to treatment

At Connection Mental Healthcare, every admission starts with an addiction assessment, in which we build a full picture of your situation. From there, our team draws up your treatment plan, which combines group therapy with individual sessions during your stay at our ketamine rehab. If you recognise ketamine symptoms in yourself or someone close to you, you can call us on +27 21 541 0643 for honest advice.