This article has multiple issues. Please help improve it or discuss these issues on the talk page . (Learn how and when to remove these messages)
|
The treatment and management of COVID-19 combines both supportive care, which includes treatment to relieve symptoms, fluid therapy, oxygen support as needed, [1] [2] [3] and a growing list of approved medications. Highly effective vaccines have reduced mortality related to SARS-CoV-2; however, for those awaiting vaccination, as well as for the estimated millions of immunocompromised persons who are unlikely to respond robustly to vaccination, treatment remains important. [4] Some people may experience persistent symptoms or disability after recovery from the infection, known as long COVID, but there is still limited information on the best management and rehabilitation for this condition. [5]
Most cases of COVID-19 are mild. In these, supportive care includes medication such as paracetamol or NSAIDs to relieve symptoms (fever, body aches, cough), proper intake of fluids, rest, and nasal breathing. [6] [7] [8] [9] Good personal hygiene and a healthy diet are also recommended. [10] As of April 2020 the U.S. Centers for Disease Control and Prevention (CDC) recommended that those who suspect they are carrying the virus isolate themselves at home and wear a face mask. [11] As of November 2020 use of the glucocorticoid dexamethasone had been strongly recommended in those severe cases treated in hospital with low oxygen levels, to reduce the risk of death. [12] [13] [14] Noninvasive ventilation and, ultimately, admission to an intensive care unit for mechanical ventilation may be required to support breathing. [5] Extracorporeal membrane oxygenation (ECMO) has been used to address respiratory failure, but its benefits are still under consideration. [15] [16] Some of the cases of severe disease course are caused by systemic hyper-inflammation, the so-called cytokine storm . [17]
Although several medications have been approved in different countries as of April 2022, not all countries have these medications. Patients with mild to moderate symptoms who are in the risk groups[ needs update ] can take nirmatrelvir/ritonavir (marketed as Paxlovid) or remdesivir, either of which reduces the risk of serious illness or hospitalization. [18] In the US, the Biden Administration COVID-19 action plan includes the Test to Treat initiative, where people can go to a pharmacy, take a COVID test, and immediately receive free Paxlovid if they test positive. [19]
Several experimental treatments are being actively studied in clinical trials. [20] These include the antivirals molnupiravir (developed by Merck), [21] and nirmatrelvir/ritonavir (developed by Pfizer). [22] [23] Others were thought to be promising early in the pandemic, such as hydroxychloroquine and lopinavir/ritonavir, but later research found them to be ineffective or even harmful, [20] [24] [25] like fluvoxamine, a cheap and widely available antidepressant; [26] As of December 2020, there was not enough high-quality evidence to recommend so-called early treatment. [24] [25] In December 2020, two monoclonal antibody-based therapies were available in the United States, for early use in cases thought to be at high risk of progression to severe disease. [25] The antiviral remdesivir has been available in the U.S., Canada, Australia, and several other countries, with varying restrictions; however, it is not recommended for people needing mechanical ventilation, and has been discouraged altogether by the World Health Organization (WHO), [27] due to limited evidence of its efficacy. [20] In November 2021, the UK approved the use of molnupiravir as a COVID treatment for vulnerable patients recently diagnosed with the disease. [28]
The WHO, the Chinese National Health Commission, the UK National Institute for Health and Care Excellence, and the United States' National Institutes of Health, among other bodies and agencies worldwide, have all published recommendations and guidelines for taking care of people with COVID-19. [29] [30] [5] [31] As of 2020 Intensivists and pulmonologists in the U.S. have compiled treatment recommendations from various agencies into a free resource, the IBCC. [32] [33]
Taking over-the-counter drugs such as paracetamol or ibuprofen, drinking fluids, taking honey to ease a cough, and resting may help alleviate symptoms. [7] [34] [35] [36]
In the early months of the pandemic, many ICU doctors faced with the virus ventured to prescribe conjectured treatments because of the unprecedented circumstances. [37] However, the standard of care for most intractable illnesses is that, as it develops over years, doctors build a body of research that tests various theories, compares and contrasts dosages, and measures one drug's power against another. [37]
Antiviral development for SARS-CoV-2 has been disappointing. [38] In January 2020, research into potential treatments started, [39] and several antiviral drugs were in clinical trials. [40] [41] In February 2020 with 'no known effective' treatments, the WHO recommended volunteers take part in trials of the effectiveness and safety of potential treatments. [42] Antiviral medications were tried in people with severe disease. [1] As of March 2020 several medications were already approved for other uses or were already in advanced testing. [43] As of April 2020 trials were investigating whether existing medications could be used effectively against the body's immune reaction to SARS-CoV-2 infection. [44] [45] As of May 2020 several antiviral drugs were under investigation for COVID-19, though none had been shown to be clearly effective on mortality in published randomized controlled trials. [44]
As of February 2021, in the European Union, the use of dexamethasone and remdesivir were authorized. [46] Corticosteroids like dexamethasone have shown clinical benefit in treating COVID-19. [47] [48] As of February 2021, the monoclonal antibody therapies bamlanivimab/etesevimab and casirivimab/imdevimab were found to reduce the number of hospitalizations, emergency room visits, and deaths. [49] [50] and both combination drugs received emergency use authorization by the US Food and Drug Administration (FDA). [49] [50]
As of February 2021 there were Emergency Use Authorizations for baricitinib, bamlanivimab, bamlanivimab/etesevimab, and casirivimab/imdevimab. [51]
As of July 2021, outpatient drugs budesonide and tocilizumab showed promising results in some patients but remained under investigation. [52] [53] [54] As of July 2021, a large number of drugs had been considered for treating COVID-19 patients. [55] As of November 2022, there was moderate-certainty evidence suggesting that dexamethasone, and systemic corticosteroids in general, probably cause a slight reduction in all-cause mortality (up to 30 days) in hospitalized patients with COVID‐19, the evidence was very uncertain at 120 days. [56]
In March 2022, the BBC wrote, "There are now many drugs that target the virus or our body in different ways: anti-inflammatory drugs that stop our immune system overreacting with deadly consequences, anti-viral drugs that make it harder for the coronavirus to replicate inside the body and antibody therapies that mimic our own immune system to attack the virus" [57]
The WHO recommendations on which medications should or should not be used to treat Covid-19 are continuously updated. As of July 2022, WHO strongly recommended for non-severe cases nirmatrelvir and ritonavir, and recommended conditionally Molnupiravir, Sotrovimab and Remdesivir. For severe cases WHO strongly recommended corticosteroids, IL-6 receptor blockers or Baricitinib and conditionally recommended casirivimab and imdevimab. [58]
For patients in a life-threatening stage of the illness and in the presence of poor prognostic predictors, early antiviral treatment is essential. [59]
As of 2020, several treatments had been investigated and found to be ineffective or unsafe, and are thus were not recommended for use; these include baloxavir marboxil, lopinavir/ritonavir, ruxolitinib, chloroquine, hydroxychloroquine, interferon β-1a, and colchicine. [14] As of 2021, favipiravir and nafamostat had shown mixed results but were still in clinical trials in some countries. [60] [61] [62]
During the early part of 2020 convalescent plasma, plasma from persons who recovered from SARS-CoV-2 infection, was frequently used with anecdotal successes in reports and small case series. [63] However subsequent trials found no consistent evidence of benefit. [64] [65] However, conflicting outcomes from trials could be understood by noting that they transfused insufficient therapeutic doses of CCP. [66]
As of February 2021, in the United States, only remdesivir had FDA approval for certain COVID-19 patients, [67] and while early research had suggested a benefit in preventing death and shortening illness duration, this was not borne out by subsequent trials. [68] [ needs update ]
On 16 April 2021, the FDA revoked the emergency use authorization (EUA) for the investigational monoclonal antibody therapy bamlanivimab, when administered alone, to be used for the treatment of mild-to-moderate COVID-19 in adults and certain pediatric patients. [69]
As of July 2022, WHO strongly recommended against treating non-severe cases with convalescent plasma, hydroxychloroquine, lopinavir-ritonavir or colchicine and recommended conditionally against corticosteroids or ivermectin or fluvoxamine or nirmatrelvir and ritonavir WHO also strongly recommended against treating severe cases with hydroxychloroquine or lopinavir-ritonavir or Baricitinib and conditionally recommended against ruxolitinib or tofacitinib, ivermectin or convalescent plasma. [58]
As of September 2022, oral treatment of outpatients with metformin, ivermectin, and fluvoxamine were found to be ineffective in a large randomized, controlled trial. [70]
In general there is no good evidence that anticoagulants have any benefit in the treatment of COVID-19, other than poor quality evidence suggesting a possible effect on all-cause mortality. [71]
People seriously ill with COVID-19 may require respiratory support. Depending on the severity, oxygen therapy, mechanical ventilation, and intravenous fluids may be required. [72]
Most cases of COVID-19 are not severe enough to require mechanical ventilation or alternatives, but a percentage of cases are. [73] [74] Some of the people acutely ill with COVID-19 experience deterioration of their lungs and acute respiratory distress syndrome (ARDS) and/or respiratory failure. Due to the high risk of death, urgent respiratory support including mechanical ventilation is often required in these people. [75] Mechanical ventilation becomes more complex as ARDS develops in COVID-19 and oxygenation becomes increasingly difficult. [76]
People who undergo mechanical ventilation are at risk of ventilator-associated lung injury or of worsening an existing lung injury, this damage is called ventilatory-induced lung injury (VILI). [75] The mechanism of this injury is thought to be due to trauma to the lungs caused by aerated regions of the lungs being over swollen (overdistension of the aerated alveoli) and atelectrauma (force on the alveolar that could lead to lung collapse). [75]
Ventilators capable of pressure control modes and optimal PEEP are needed to maximise oxygen delivery while minimising the risk of ventilator-associated lung injury and pneumothorax. [77] [75] [78] An approach to enable the person to breath spontaneously while being mechanically ventilated by adjusting the level of sedation and the respirator settings has been suggested, with the goal of reducing atrophy of the diaphragm. [79] There is no clear evidence to suggest that enabling spontaneous breathing early while being mechanically ventilated is either beneficial or detrimental for the person's recovery. [79]
Other approaches to mechanical ventilation including avoiding intubation using a high flow nasal cannula or bi-level positive airway pressure are under investigation, however, the effectiveness of these approaches compared to intubation are not clear. [80] Some doctors prefer staying with invasive mechanical ventilation when available because this technique limits the spread of aerosol particles compared to a high flow nasal cannula. [73]
The administration of inhaled nitric oxide to people being ventilated is not recommended, and evidence around this practice is weak. [81]
Extracorporeal membrane oxygenation (ECMO) is an artificial lung technology that has been used since the 1980s to treat respiratory failure and acute respiratory distress syndrome when conventional mechanical ventilation fails. In this complex procedure, blood is removed from the body via large cannulae, moved through a membrane oxygenator that performs the lung functions of oxygen delivery and carbon dioxide removal, and then returned to the body. The Extracorporeal Life Support Organization (ELSO) maintains a registry of outcomes for this technology, and as of September 2020 it has been used in less than 120,000 patients over 435 ECMO centers worldwide with 40% mortality for adult respiratory patients. [82]
Initial use of ECMO in COVID-19 patients from China early in the pandemic suggested poor outcomes, with less than 90% mortality. [83] In March 2020, the ELSO registry began collecting data on the worldwide use of ECMO for patients with COVID-19 and reporting this data on the ELSO website in real time. In September 2020, the outcomes of 1,035 COVID-19 patients supported with ECMO from 213 experienced centers in 36 different countries were published in The Lancet, and demonstrated 38% mortality, which is similar to many other respiratory diseases treated with ECMO. The mortality is also similar to the 35% mortality seen in the EOLIA trial, the largest randomized controlled trial for ECMO in ARDS. [84] This registry based, multi-center, multi-country data provide provisional support for the use of ECMO for COVID-19 associated acute hypoxemic respiratory failure. Given that this is a complex technology that can be resource intense, guidelines exist for the use of ECMO during the COVID-19 pandemic. [85] [86] [87]
Individuals may experience distress from quarantine, travel restrictions, side effects of treatment, or fear of the infection itself. To address these concerns, the National Health Commission of China published a national guideline for psychological crisis intervention on 27 January 2020. [88] [89]
According to the Inter-Agency Standing Committee (IASC) Guidelines on Mental Health and Psychosocial Support, the pandemic produced long-term consequences. Deterioration of social networks and economies, survivor stigma, anger and aggression, and mistrust of official information are long-term consequences. [90]
In April 2020 The Lancet published a 14-page call for action focusing on the UK and stated conditions were such that a range of mental health issues was likely to become more common. BBC quoted Rory O'Connor in saying, "Increased social isolation, loneliness, health anxiety, stress, and an economic downturn are a perfect storm to harm people's mental health and wellbeing." [91] [92]
Early in the pandemic, theoretical concerns were raised about ACE inhibitors and angiotensin receptor blockers. However, later research in March 2020 found no evidence to justify stopping these medications in people who take them for conditions such as high blood pressure. [5] [93] [94] [95] One study from April 2020 found that people with COVID-19 and hypertension had lower all-cause mortality when on these medications. [96] Similar concerns were raised about non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen; these were likewise not borne out, and NSAIDs may both be used to relieve symptoms of COVID-19 and continue to be used by people who take them for other conditions. [97]
People who use topical or systemic corticosteroids for respiratory conditions such as asthma or chronic obstructive pulmonary disease should continue taking them as prescribed even if they contract COVID-19. [47]
The principal for obstetric management of COVID-19 include rapid detection, isolation, and testing, profound preventive measures, regular monitoring of fetus as well as of uterine contractions, peculiar case-to-case delivery planning based on severity of symptoms, and appropriate post-natal measures for preventing infection. [98]
Patients with simultaneous SARS CoV2 and Influenza infection are more than twice as likely to die and more than four times as likely to need ventilation as patients with only COVID. It is recommended that patients admitted to hospital with COVID should be routinely tested to see if they also have Influenza. The public are advised to get vaccinated against both Influenza and COVID. [99]
Severe cases are most common in older adults (those older than 60 years, [73] and especially those older than 80 years). [100] Many developed countries do not have enough hospital beds per capita, which limits a health system's capacity to handle a sudden spike in the number of COVID-19 cases severe enough to require hospitalisation. [101] This limited capacity is a significant driver behind calls to flatten the curve. [101] One study in China found 5% were admitted to intensive care units, 2.3% needed mechanical support of ventilation, and 1.4% died. [15] In China, approximately 30% of people in hospital with COVID-19 are eventually admitted to ICU. [102]
Dexamethasone is a fluorinated glucocorticoid medication used to treat rheumatic problems, a number of skin diseases, severe allergies, asthma, chronic obstructive lung disease, croup, brain swelling, eye pain following eye surgery, superior vena cava syndrome, and along with antibiotics in tuberculosis. In adrenocortical insufficiency, it may be used in combination with a mineralocorticoid medication such as fludrocortisone. In preterm labor, it may be used to improve outcomes in the baby. It may be given by mouth, as an injection into a muscle, as an injection into a vein, as a topical cream or ointment for the skin or as a topical ophthalmic solution to the eye. The effects of dexamethasone are frequently seen within a day and last for about three days.
Extracorporeal membrane oxygenation (ECMO), is a form of extracorporeal life support, providing prolonged cardiac and respiratory support to persons whose heart and lungs are unable to provide an adequate amount of oxygen, gas exchange or blood supply (perfusion) to sustain life. The technology for ECMO is largely derived from cardiopulmonary bypass, which provides shorter-term support with arrested native circulation. The device used is a membrane oxygenator, also known as an artificial lung.
Protease inhibitors (PIs) are medications that act by interfering with enzymes that cleave proteins. Some of the most well known are antiviral drugs widely used to treat HIV/AIDS, hepatitis C and COVID-19. These protease inhibitors prevent viral replication by selectively binding to viral proteases and blocking proteolytic cleavage of protein precursors that are necessary for the production of infectious viral particles.
Chloroquine is a medication primarily used to prevent and treat malaria in areas where malaria remains sensitive to its effects. Certain types of malaria, resistant strains, and complicated cases typically require different or additional medication. Chloroquine is also occasionally used for amebiasis that is occurring outside the intestines, rheumatoid arthritis, and lupus erythematosus. While it has not been formally studied in pregnancy, it appears safe. It was studied to treat COVID-19 early in the pandemic, but these studies were largely halted in the summer of 2020, and the NIH does not recommend its use for this purpose. It is taken by mouth.
Bronchoalveolar lavage (BAL), also known as bronchoalveolar washing, is a diagnostic method of the lower respiratory system in which a bronchoscope is passed through the mouth or nose into an appropriate airway in the lungs, with a measured amount of fluid introduced and then collected for examination. This method is typically performed to diagnose pathogenic infections of the lower respiratory airways, though it also has been shown to have utility in diagnosing interstitial lung disease. Bronchoalveolar lavage can be a more sensitive method of detection than nasal swabs in respiratory molecular diagnostics, as has been the case with SARS-CoV-2 where bronchoalveolar lavage samples detect copies of viral RNA after negative nasal swab testing.
Umifenovir, sold under the brand name Arbidol, is sold and used as an antiviral medication for influenza in Russia and China. The drug is manufactured by Pharmstandard. It is not approved by the U.S. Food and Drug Administration (FDA) for the treatment or prevention of influenza.
Lopinavir/ritonavir (LPV/r), sold under the brand name Kaletra among others, is a fixed-dose combination antiretroviral medication for the treatment and prevention of HIV/AIDS. It combines lopinavir with a low dose of ritonavir. It is generally recommended for use with other antiretrovirals. It may be used for prevention after a needlestick injury or other potential exposure. It is taken by mouth as a tablet, capsule, or solution.
Baricitinib, sold under the brand name Olumiant among others, is an immunomodulatory medication used for the treatment of rheumatoid arthritis, alopecia areata, and COVID-19. It acts as an inhibitor of janus kinase (JAK), blocking the subtypes JAK1 and JAK2.
Remdesivir, sold under the brand name Veklury, is a broad-spectrum antiviral medication developed by the biopharmaceutical company Gilead Sciences. It is administered via injection into a vein. During the COVID‑19 pandemic, remdesivir was approved or authorized for emergency use to treat COVID‑19 in numerous countries.
Coronavirus disease 2019 (COVID-19) is a contagious disease caused by the coronavirus SARS-CoV-2. The first known case was identified in Wuhan, China, in December 2019. Most scientists believe the SARS-CoV-2 virus entered into human populations through natural zoonosis, similar to the SARS-CoV-1 and MERS-CoV outbreaks, and consistent with other pandemics in human history. Social and environmental factors including climate change, natural ecosystem destruction and wildlife trade increased the likelihood of such zoonotic spillover. The disease quickly spread worldwide, resulting in the COVID-19 pandemic.
Drug repositioning is the repurposing of an approved drug for the treatment of a different disease or medical condition than that for which it was originally developed. This is one line of scientific research which is being pursued to develop safe and effective COVID-19 treatments. Other research directions include the development of a COVID-19 vaccine and convalescent plasma transfusion.
COVID-19 drug development is the research process to develop preventative therapeutic prescription drugs that would alleviate the severity of coronavirus disease 2019 (COVID-19). From early 2020 through 2021, several hundred drug companies, biotechnology firms, university research groups, and health organizations were developing therapeutic candidates for COVID-19 disease in various stages of preclinical or clinical research, with 419 potential COVID-19 drugs in clinical trials, as of April 2021.
Convalescent plasma is the blood plasma collected from a survivor of an infectious disease. This plasma contains antibodies specific to a pathogen and can be used therapeutically by providing passive immunity when transfusing it to a newly infected patient with the same condition. Convalescent plasma can be transfused as it has been collected or become the source material for hyperimmune serum or anti-pathogen monoclonal antibodies; the latter consists exclusively of IgG, while convalescent plasma also includes IgA and IgM. Collection is typically achieved by apheresis, but in low-to-middle income countries, the treatment can be administered as convalescent whole blood.
The Solidarity trial for treatments is a multinational Phase III-IV clinical trial organized by the World Health Organization (WHO) and partners to compare four untested treatments for hospitalized people with severe COVID-19 illness. The trial was announced 18 March 2020, and as of 6 August 2021, 12,000 patients in 30 countries had been recruited to participate in the trial.
An aerosol-generating procedure (AGP) is a medical or health-care procedure that a public health agency such as the World Health Organization or the United States Centers for Disease Control and Prevention (CDC) has designated as creating an increased risk of transmission of an aerosol borne contagious disease, such as COVID-19. The presumption is that the risk of transmission of the contagious disease from a patient having an AGP performed on them is higher than for a patient who is not having an AGP performed upon them. This then informs decisions on infection control, such as what personal protective equipment (PPE) is required by a healthcare worker performing the medical procedure, or what PPE healthcare workers are allowed to use.
The Randomised Evaluation of COVID-19 Therapy is a large-enrollment clinical trial of possible treatments for people in the United Kingdom admitted to hospital with severe COVID-19 infection. The trial was later expanded to Indonesia, Nepal and Vietnam. The trial has tested ten interventions on adults: eight repurposed drugs, one newly developed drug and convalescent plasma.
Chloroquine and hydroxychloroquine are anti-malarial medications also used against some auto-immune diseases. Chloroquine, along with hydroxychloroquine, was an early experimental treatment for COVID-19. Neither drug has been useful to prevent or treat SARS-CoV-2 infection. Administration of chloroquine or hydroxychloroquine to COVID-19 patients, either as monotherapies or in conjunction with azithromycin, has been associated with deleterious outcomes, such as QT prolongation. As of 2024, scientific evidence does not substantiate the efficacy of hydroxychloroquine, with or without the addition of azithromycin, in the therapeutic management of COVID-19.
COVID-19 hospital is a general name given to clinical institutions that provide medical treatment to Coronavirus Disease 2019 (COVID-19) infected patients. According to the World Health Organisation (WHO)'s COVID-19 regulations, it is critical to distribute COVID-19 patients to different medical institutions based on their severity of symptoms and the medical resource availability in different geographical regions. It is recommended by the WHO to distribute patients with the most severe symptoms to the most equipped, COVID-19 focused hospitals, then patients with less severe symptoms to local institutions and lastly, patients with light symptoms to temporary COVID-19 establishments for appropriate isolation and monitoring of disease progression. Countries, like China, Germany, Russia, the United Kingdom and the United States have established their distinctive COVID-19 clinical set-ups based on the general WHO guidelines. Future pandemic protocols have also been adapted based on handling COVID-19 on a national and global scale.
Nirmatrelvir is an antiviral medication developed by Pfizer which acts as an orally active 3C-like protease inhibitor. It is part of a nirmatrelvir/ritonavir combination used to treat COVID-19 and sold under the brand name Paxlovid.
Nirmatrelvir/ritonavir, sold under the brand name Paxlovid, is a co-packaged medication used as a treatment for COVID‑19. It contains the antiviral medications nirmatrelvir and ritonavir and was developed by Pfizer. Nirmatrelvir inhibits SARS-CoV-2 main protease, while ritonavir is a strong CYP3A inhibitor, slowing down nirmatrelvir metabolism and therefore boosting its effect. It is taken by mouth.
"A fragmented research response, characterised by small-scale and localised initiatives, will not yield the clear insights necessary to guide policymakers or the public