Negative Symptoms in Schizophrenia

Negative symptoms are a core component of schizophrenia that account for a large part of the long-term disability and poor functional outcomes in patients with the disorder. These symptoms describe a lessening or absence of normal behaviors and functions, and they can be just as disabling—if not more so—than the more dramatic symptoms like hallucinations.

Table of contents

• What Are Negative Symptoms?
• The Five Key Constructs of Negative Symptoms
• How Common Are Negative Symptoms?
• When Do Negative Symptoms Occur?
• Primary and Secondary Negative Symptoms
• Impact on Quality of Life and Functioning
• Treatment Approaches
• Self-Help Strategies and Coping Tips

What Are Negative Symptoms?

To understand negative symptoms, it helps to know that schizophrenia symptoms are usually classified into two main groups: positive and negative. The terms “positive” and “negative” don’t mean “good” and “bad.” Instead, positive symptoms refer to experiences or behaviors that are added to a person’s life—things that weren’t there before the illness, such as hallucinations (seeing or hearing things that aren’t real) or delusions (strong beliefs not based on reality)^[1][2].

Negative symptoms, on the other hand, describe thoughts or behaviors that a person used to have before they became ill but now no longer have, or have to a lesser extent. These symptoms represent a lessening or absence of normal behaviors and functions related to motivation and interest, or verbal and emotional expression^[1][5]. In simple terms, negative symptoms are normal aspects of behavior that have been lost or taken away.

The Five Key Constructs of Negative Symptoms

The negative symptom domain consists of five key constructs that affect different aspects of a person’s life^[1]:

• Blunted affect: This refers to a reduction in facial expressions, eye contact, gestures, and voice patterns. A person with blunted affect may appear emotionless and flat, with little change in facial expression. They may speak in a monotone voice and seem to lack normal emotional responses^[1][3].
• Alogia: This means a reduction in the quantity of words spoken. People with alogia may give brief, empty replies to questions and have trouble elaborating on their thoughts. Their speech may become sparse and difficult to follow^[1].
• Avolition: This is reduced goal-directed activity due to decreased motivation. A person may have trouble starting and finishing activities, show little interest in work or studies, and struggle with basic tasks like personal hygiene^[1][5].
• Asociality: This refers to reduced social drive and lack of interest in social interactions. People may withdraw from friends and family, prefer to be alone, and have no desire to form or maintain relationships^[1][5].
• Anhedonia: This is a reduced experience of pleasure. People with anhedonia have difficulty enjoying activities they once found pleasurable, including hobbies, social interactions, and other previously rewarding experiences^[1].

How Common Are Negative Symptoms?

Negative symptoms are very common in schizophrenia. Research shows that up to 60% of patients may have prominent, clinically relevant negative symptoms that require treatment^[1]. More than half of patients with chronic schizophrenia exhibit at least one negative symptom^[6]. These symptoms tend to be persistent and long-lasting, making them a major source of burden for both patients and their caregivers.

When Do Negative Symptoms Occur?

Negative symptoms can occur at any point in the course of the illness. Interestingly, they are reported as the most common first symptom of schizophrenia^[1]. These initial negative symptoms often appear several months or years before somebody experiences their first acute episode with symptoms like delusions or hallucinations. This early period is often referred to as the prodromal period of schizophrenia^[3].

During the prodromal period, symptoms usually appear gradually and slowly get worse. It can be difficult to tell if these are symptoms of schizophrenia or something else. The changes may be mistaken for typical teenage behavior or dismissed as laziness or rudeness^[3][5].

The way negative symptoms manifest varies greatly from person to person. For some, negative symptoms may appear at the outset and be the first indication that anything is wrong. Other people may experience positive symptoms initially and only develop negative symptoms later. Similarly, for some people the positive symptoms may dominate, whereas in others the negative symptoms may be more prevalent^[5].

Primary and Secondary Negative Symptoms

It’s important to understand that negative symptoms can be primary or secondary. This distinction matters because it affects how they should be treated^[1][6].

Primary negative symptoms are intrinsic to the underlying disease process of schizophrenia itself. They are considered a core component of the disorder and are directly related to its biological basis^[1][6].

Secondary negative symptoms, on the other hand, are related to other factors, including^[1][6]:

• Positive symptoms (such as voices telling someone to stay isolated)
• Depression or other psychiatric conditions that may occur alongside schizophrenia
• Adverse effects of treatment, particularly side effects from antipsychotic medications like sedation or stiffness
• Medical conditions or substance abuse
• Environmental factors such as social isolation or lack of stimulation

While secondary negative symptoms can improve when the underlying cause is addressed—for example, by treating depression or adjusting medication—primary negative symptoms generally do not respond well to currently available treatments^[1]. If secondary negative symptoms overlap with primary negative symptoms, it can create a false impression of worsening symptoms, which may lead to incorrect treatment strategies^[6].

Impact on Quality of Life and Functioning

Negative symptoms have devastating consequences on patients’ lives. Research suggests that negative symptoms contribute more to poor functional outcomes and quality of life than positive symptoms do^[7]. They are the major contributor to low function levels and debilitation in most patients with schizophrenia^[7].

People with prominent negative symptoms struggle with many functional impairments. These include^[7]:

• Difficulty performing independent living skills
• Problems with social functioning and maintaining relationships
• Challenges with occupational or educational performance and achievement

Most patients require some form of public assistance for support, and only 10% to 20% of patients are able to sustain full-time or part-time competitive employment^[7]. Poorly motivated patients cannot function adequately at school or work. Relationships with family and friends decay in the face of unresponsive affect and inattention to social cues. Personal interests yield to the dampening influences of anhedonia, apathy, and inattention^[7].

The desire to connect and be part of positive social relations with others is a basic human goal. However, people living with schizophrenia with prominent negative symptoms don’t enjoy social activities as much and have trouble engaging with others, starting tasks, and getting motivated to start and finish activities^[16]. Even with treatment, people with schizophrenia are more likely to feel socially isolated and not enjoy social contact as much as people who don’t have serious mental illness.

Caregivers of patients with negative symptoms also report high levels of burden^[7]. Negative symptoms can lead to family problems and strain relationships, as they are sometimes mistaken for deliberate laziness or rudeness^[3].

Treatment Approaches

Treatment of negative symptoms has been identified as a vital unmet clinical need for many persons with schizophrenia^[7]. While antipsychotic medications are highly effective for positive symptoms, they have limited effectiveness for negative symptoms^[7][10].

The first step in treating negative symptoms is to rule out other potential causes. This involves^[9][14]:

• Checking whether psychosis itself is causing the apparent negative symptoms (for example, if voices are telling someone to stay isolated)
• Addressing any comorbid conditions that might contribute, such as depression, PTSD, substance use, insomnia, or sleep apnea
• Reviewing antipsychotic side effects that can resemble negative symptoms, including sedation, muscle stiffness, and slowing of movements

Medication Options

Among antipsychotic medications, some have shown better results for negative symptoms than others. Second-generation antipsychotics are generally preferred over first-generation antipsychotics, as they are associated with better functional outcomes and lower cognitive impairment^[11].

The antipsychotic cariprazine has shown favorable results in studies specifically testing its effects on negative symptoms in patients who had recovered from psychosis but continued to experience prominent negative symptoms. However, the benefit was small^[14]. Amisulpride, an antipsychotic available in Europe that may come to the US market, has also shown positive results^[14].

Clozapine is another option. Although its effects on negative symptoms are not well researched, this medication brings about higher rates of functional recovery and had the largest effect in reducing negative symptoms compared to other antipsychotics^[14].

Augmentation Strategies

Another approach is to add medications to the antipsychotic. Studies of antidepressants, particularly SSRIs, have been generally positive, though the benefits are small. Some antidepressants like duloxetine, mirtazapine, and vortioxetine have shown larger effect sizes for negative symptoms, although the studies are still small in size and few in number^[14].

The combination of antipsychotics and antidepressants may improve negative symptoms while addressing some affective disorders associated with schizophrenia. However, there is no clear information available on the effects of this combination on primary negative symptoms or on the mechanism of action^[11].

Psychosocial Interventions

Nonpharmacological interventions offer promising avenues for addressing negative symptoms. These include various forms of therapy and rehabilitation programs that can help people develop skills and strategies to manage their symptoms better^[9].

Self-Help Strategies and Coping Tips

In the absence of highly effective medication treatments for negative symptoms, it’s important to think about other ways people with schizophrenia can improve their lives. Following your treatment plan and making lifestyle adjustments can help manage symptoms and find support^[15].

Stay on Track with Treatment

If you have problems with negative symptoms, it’s really important that you speak to a psychiatrist about it. The doctor may be able to change the antipsychotic you’re taking or adjust the dose in case side effects are making things worse. It’s also important to know whether your problems are due to negative symptoms or to depression, and your regular doctor may not be able to assess this^[15].

Stay Active

Regular physical exercise has many psychological benefits for mental health conditions. In addition, people with schizophrenia are more likely to develop metabolic syndrome, and many antipsychotic medications increase this risk. Regular exercise can help prevent or treat these conditions and also serve as a healthy coping mechanism for stress^[19].

Examples of activities you can add to your routine include yoga, swimming or water aerobics, cycling, or even “cozy cardio”—gentle, comfortable exercise done at home^[19].

Eat Well

A healthy diet can prevent excessive weight gain, help manage blood sugar and cholesterol, and improve overall health^[19]. One great option is the Mediterranean diet, which focuses on whole foods, plenty of vegetables and fruits, lean protein, and healthy fats. A healthy diet can also help structure your day by scheduling three meals at the same time daily.

Manage Stress

Stress can have a significant impact on mental health, and living with schizophrenia can itself be stressful. Managing stress is important to help minimize its impact on symptoms^[19]. Techniques for stress relief include relaxation techniques, mindfulness, meditation, and breathwork exercises such as progressive muscle relaxation, five-finger breathing, or yoga.

Build a Support Network

One of the best things for managing schizophrenia is community support. Having a support network is going to help a person cope with their illness^[19]. This can include family members, friends, support groups, or mental health professionals who understand the condition.

Structure Your Day

Breaking tasks into smaller, manageable steps can help overcome avolition and make activities feel less overwhelming. Setting small, achievable goals and creating a daily routine can provide structure and a sense of accomplishment^[15][21].

Seek Engagement

Even when motivation is low, trying to engage in some form of activity—whether it’s a hobby, volunteering, or work experience—can help combat negative symptoms. Starting with small commitments and gradually building up can make social interaction and activity more manageable^[15].

While negative symptoms remain challenging to treat, understanding them better and using a combination of medical treatment, self-help strategies, and support can help improve quality of life and functioning for people living with schizophrenia.