Skip to main content

How to follow-up a patient who received tocilizumab in severe COVID-19: a case report



COVID-19 is characterized by fast deterioration in the mechanism of cytokine storm. Therefore, treatment with immunomodulating agents should be initiated as soon as hyperinflammation is established. Evidence for the use of tocilizumab (TCZ) in COVID-19 is emerging, but the drug in this setting is used “off label” with limited data on both effectiveness and safety. Therefore, Hospital for Infectious Diseases in Warsaw established a Standard Operating Procedure (SOP) for the use of TCZ in severe COVID-19 cases.

Case presentation

Here, we present a case of 27-year-old, otherwise healthy man, who was successfully treated with chloroquine, azithromycin, tocilizumab and a standard of care. Initially the magnitude of lung devastation, clinical deterioration and the need for mechanical ventilation suggested unfavorable prognosis. However, we observed complete regression in radiological changes and rapid clinical improvement. Irrespective of this, patient’s serum interleukin 6 and aminotransferases remained elevated even after a month from treatment.


An overlapping effect of hyperinflammation, hypoxic organ injury and drug-related toxicity warrants a long-term follow-up for COVID-19 survivors. In addition, residual IL-6 receptors blockage may mask new infections. A standardized approach to follow-up for COVID-19 survivors is urgently needed. Current and future research should also investigate the impact of experimental therapies on lung tissue healing and regeneration, as well as long-term treatment toxicities.


In the course of SARS-CoV-2, most infections are mild or asymptomatic, but up to 25% of hospitalized patients would experience severe complications and progress to critical condition characterized by acute respiratory distress syndrome (ARDS), requiring mechanical ventilation [1]. In the course of Coronavirus Disease 2019 (COVID-19) pathogenic T cells and inflammatory monocytes may enter the pulmonary circulation and initiate the inflammatory storm leading to lung injury and immune disorder in severe COVID-19 patients [2]. Zhang et al. discussed that the sIL-6R (soluble receptor) and mIL-6R (membrane receptor) blockage with tocilizumab used in COVID-19-related cytokine release syndrome may reduce the mortality [3]. This has been confirmed by several retrospective cohort studies and case series from China and Europe [4,5,6,7,8,9,10]. The Polish Association of Epidemiologists and Infectiologists recommendations include TCZ as an option for COVID-19 treatment [11]. Therefore, the Hospital for Infectious Diseases in Warsaw established a Standard Operating Procedure (SOP) for its use in this specific indication. Patients were qualified for TCZ if having PCR-confirmed SARS-CoV-2 infection with evidence of COVID-19 pneumonia on chest X-ray, increased IL-6 level and peripheral oxygen saturation (SpO2) ≤ 93% or PAO2/FiO2 ratio < 200 mmHg. For each patient fulfilling inclusion criteria risk–benefit ratio was verified by a committee of three physicians including patient’s physician, intensive care specialist and SOP coordinating physician. This process included verification of any evidence of severe infection other than SARS-CoV-2, as well as review of exclusion criteria. The recommended dosing was 8 mg/kg with a maximum dose of 800 mg per infusion and a second dose of TZC allowed after 8–12 h. The SOP was approved by Bioethical Committee of Medical University of Warsaw (nr KB68/2020).

Case presentation

A 27-year-old, otherwise healthy man with no health risks, was admitted to infectious disease ward with a week history of weakness, fever and sore throat. Due to these conditions he was treated with amoxicillin and clarithromycin with no clinical improvement. On admission the patient reported fever, cough and dyspnea. He had no concomitant chronic conditions and did not take any prescribed medication. On examination he was overweight (body mass 86 kg, BMI 27.8 kg/m2), body temperature of 39.9 °C degrees, blood pressure 138/83 mm Hg, HR 122/min. and respiratory rate 20/min. His peripheral oxygen saturation (SpO2) was 88% and improved to 95% on 6 l/min. oxygen supplementation.

A nasal swab was obtained on admission and reverse transcriptase-polymerase chain reaction (RT-PCR) assay confirmed SARS-CoV-2 infection. On baseline the patient was anti-HIV, anti-HCV and HBsAg negative. Monitoring of ferritin, C-reactive protein (CRP), fibrinogen, D-dimers and interleukin 6 (IL-6) was performed (Table 1). The patient received 500 mg of chloroquine twice daily and 500 mg of azithromycin once daily, according to earlier approved local standard of care. Due to initial suspicion of the lung abscess formation seen on the first chest X-ray, vancomycin was added (Fig. 1a). His computer tomography revealed bilateral changes typical for COVID-19 pneumonia and did not confirm changes characteristic for bacterial infection (Fig. 2a). In addition, low molecular weight heparin in prophylactic doses was started.

Table 1 Body weight and laboratory values measured over time in reported patient
Fig. 1

The evolution of pulmonary infiltrates in X-ray

Fig. 2

The evolution of pulmonary infiltrates in computer tomography

Within several hours from admission and irrespective of oxygen supplementation of 15 l/min, his SpO2 dropped to 90%. He was diagnosed with ARDS, intubated and admitted to intensive care unit. There he was qualified to receive TCZ according to SOP (two doses of 800 mg). The patient was ventilated with P/SIMV (FiO2 1,0-0,9-1,0, f 20, Pi20, PEEP 12) and received standard empiric antibiotic therapy (meropenem and continuation of vancomycin). Patient’s state did not change substantially over the next 4 days, however his body temperature normalized and CRP dropped. At the same time, his pulmonary infiltrates intensified on the control X-ray (Fig. 1b). However, his SpO2 steadily improved as presented in Table 1. After TCZ infusion IL-6 levels increased over ten times, but decreased within the next 3 days (Table 1). In terms of adverse effects the patient had transaminases and GGTP flair, as well as kidney function deterioration on day 7, i.e., 4 days after TCZ infusion (Table 1). On the fifth day the patient’s state improved significantly and he was extubated. After moving back to infectious disease department, the patient continued to improve with normalization of inflammatory markers. The patient was discharged from the hospital on day 21 after confirming significant improvement in his CT scan and two negative SARS-CoV-2 RT-PCR from nasopharyngeal swabs (Fig. 2, Table 1).

A follow-up hospitalization on day 35 revealed no radiological changes on chest X-ray, negative SASR-CoV-2 RT-PCR from nasopharyngeal swab. However, the level of IL-6 and alanine aminotransferase activity were increased. The patient reported improving tolerance for physical activity, but he was unable to perform his previous activities with the same strength, e.g., singing.

Discussion and conclusions

Data on COVID-19 treatment effectiveness and long-term safety are currently sparse. Post-hospitalization follow-up is neither recommended nor their outcomes available in the current publications. Most work in the post-hospitalization area focuses on epidemiological considerations and psychological well-being [12]. In such events, case studies remain an important area of knowledge sharing and could support building expertise in the field where evidence-based approach is not yet available. Here, we present a case of severe COVID-19 in a 27-year-old, otherwise healthy patient. Although we observed full recovery in clinical, radiological and viral terms, some important adverse effects were present during hospitalization and afterwards. In terms of kidney and hepatic injury in the presented patient, it is uncertain whether this was an effect of prescribed treatment (chloroquine, antibiotics and TCZ), hyperinflammation or post-hypoxic organ injury [13,14,15].

Guaraldi et al. showed that TCZ treatment was associated with a 40% reduction in the risk of invasive mechanical ventilation or death, but at the same time 13% of patients treated with TCZ were diagnosed with new infections, as compared to only 4% of patients treated with standard of care alone [16]. It clearly shows that the risk–benefit ratio for this approach is uncertain and needs to be further evaluated by randomized controlled trials, which are currently ongoing [17, 18]. In our patient, elevated IL-6 was observed even on day 35, which suggests a residual IL-R6 receptor blockage. As TCZ is anti-inflammatory agent a delay in the diagnosis of infection due to reduced fever and inflammation markers is likely [19]. These overlapping factors warrants careful long-term follow-up of COVID-19 patients in terms of adverse effects of medical interventions.

As reported by Phua et al. in a systematic review, 30% of patients survive ARDS and 70% of survivors will live with significant disability [20]. It remains uncertain to what extent this applies to COVID-19 survivors. Although our case report shows that young patients with no concomitant diseases can present full ‘radiological’ recovery, we were not able to perform any functional lung tests, such as spirometry or plethysmography, due to epidemiological restrictions. Data on a longer term pulmonological assessment and follow-up of COVID-19 survivors are sparse. In addition, it remains on research peripheries and outside recommendation area. Therefore, we introduced to our local practice two planned follow-up visits: 6 weeks after discharge from the hospital to verify immediate complications and after another 6 weeks to check on patients full recovery or any disabilities.

Another area lacking precision in most guidelines is when to introduce anti-inflammatory treatment and how to monitor its effectiveness and safety. Only few studies investigated an IL-6 level in which TCZ could be indicated in COVID-19 context. Herold et al. proposed a range of 40–80 pg/ml, but most clinical trials do not provide IL-6 threshold guided treatment and follow-up [17, 21].

As for the effectiveness and safety although ferritin, CRP, fibrinogen and D-dimers levels may be indicative of hyperinflammation these markers are highly nonspecific. IL-6 monitoring seems to be more accurate as a marker of immune system activation, but its levels are highly dependent on age, concomitant diseases (e.g., cancers) and host genetics [22]. Therefore, all these markers need to be monitored frequently to capture the dynamic and predict incoming cytokine storm, but should not mitigate the clinical symptoms progression. As presented also in our case report, IL-6 levels indicate the effectiveness of receptor blockage after TCZ infusion. They have been also proposed as a good prognostic marker after TCZ infusion [6, 7]. Herold et al. presented maximal level of IL-6 followed by CRP level as highly predictive of the need for mechanical ventilation [21]. Therefore, in our experience, all inflammatory markers in symptomatic COVID-19 patients should be monitored at least daily. A decision on TCZ treatment should be made by a multidisciplinary group and individualized for a given patient taking into account the evolution of clinical presentation, dynamic in inflammatory markers and the risk related to concomitant diseases or infections. Currently most interventions are used in COVID-19 experimentally and/or “off label”, therefore careful risk to benefit assessment needs to be performed for each patient individually in order to ascertain minimum harm with maximal benefit.

A standardized approach to follow-up for COVID-19 survivors is urgently needed. Current and future research should also investigate the impact of experimental therapies on lung tissue healing and regeneration, as well as long-term treatment toxicities.

Availability of data and materials

Not applicable.


  1. 1.

    Huang C, Wang Y, Li X, Ren L, Zhao J, Hu Y, et al. Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China. Lancet. 2020;395:497–506.

    CAS  Article  Google Scholar 

  2. 2.

    Fu B, Xu X, Wei H. Why tocilizumab could be an effective treatment for severe COVID-19? J Transl Med. 2020;18:164.

    CAS  Article  Google Scholar 

  3. 3.

    Zhang C, Wu Z, Li JW, Zhao H, Wang GQ. Cytokine release syndrome in severe COVID-19: interleukin-6 receptor antagonist tocilizumab may be the key to reduce mortality. Int J Antimicrob Agents. 2020;55:105954.

    CAS  Article  Google Scholar 

  4. 4.

    Eimer J, Vesterbacka J, Svensson AK, Stojanovic B, Wagrell C, Sonnerborg A, et al. Tocilizumab shortens time on mechanical ventilation and length of hospital stay in patients with severe COVID-19: a retrospective cohort study. J Intern Med. 2020.

    Article  PubMed  PubMed Central  Google Scholar 

  5. 5.

    Tomasiewicz K, Piekarska A, Stempkowska-Rejek J, Serafinska S, Gawkowska A, Parczewski M, et al. Tocilizumab for patients with severe COVID-19: a retrospective, multi-center study. Expert Rev Anti Infect Ther. 2020.

    Article  PubMed  PubMed Central  Google Scholar 

  6. 6.

    Luo P, Liu Y, Qiu L, Liu X, Liu D, Li J. Tocilizumab treatment in COVID-19: a single center experience. J Med Virol. 2020;92:814–8.

    CAS  Article  Google Scholar 

  7. 7.

    Xu X, Han M, Li T, Sun W, Wang D, Fu B, et al. Effective treatment of severe COVID-19 patients with tocilizumab. Proc Natl Acad Sci USA. 2020;117:10970–5.

    CAS  Article  Google Scholar 

  8. 8.

    Michot JM, Albiges L, Chaput N, Saada V, Pommeret F, Griscelli F, et al. Tocilizumab, an anti-IL6 receptor antibody, to treat Covid-19-related respiratory failure: a case report. Ann Oncol. 2020;31:961–4.

    Article  Google Scholar 

  9. 9.

    Kewan T, Covut F, Al-Jaghbeer MJ, Rose L, Gopalakrishna KV, Akbik B. Tocilizumab for treatment of patients with severe COVID-19: a retrospective cohort study. EClinicalMedicine. 2020;24:100418.

    Article  Google Scholar 

  10. 10.

    Capra R, De Rossi N, Mattioli F, Romanelli G, Scarpazza C, Sormani MP, et al. Impact of low dose tocilizumab on mortality rate in patients with COVID-19 related pneumonia. Eur J Intern Med. 2020;76:31–5.

    CAS  Article  Google Scholar 

  11. 11.

    Flisiak R, Horban A, Jaroszewicz J, Kozielewicz D, Pawlowska M, Parczewski M, et al. Recommendations of management in SARS-CoV-2 infection of the Polish Association of Epidemiologists and Infectiologists. Pol Arch Intern Med. 2020;130:352–7.

    PubMed  Google Scholar 

  12. 12.

    Zheng Z, Yao Z, Wu K, Zheng J. Patient follow-up after discharge after COVID-19 pneumonia: considerations for infectious control. J Med Virol. 2020.

    Article  PubMed  PubMed Central  Google Scholar 

  13. 13.

    Waseem N, Chen PH. Hypoxic hepatitis: a review and clinical update. J Clin Transl Hepatol. 2016;4:263–8.

    PubMed  PubMed Central  Google Scholar 

  14. 14.

    Shu S, Wang Y, Zheng M, Liu Z, Cai J, Tang C, et al. Hypoxia and hypoxia-inducible factors in kidney injury and repair. Cells. 2019;8:207.

    CAS  Article  Google Scholar 

  15. 15.

    Emery P, Keystone E, Tony HP, Cantagrel A, van Vollenhoven R, Sanchez A, et al. IL-6 receptor inhibition with tocilizumab improves treatment outcomes in patients with rheumatoid arthritis refractory to anti-tumour necrosis factor biologicals: results from a 24-week multicentre randomised placebo-controlled trial. Ann Rheum Dis. 2008;67:1516–23.

    CAS  Article  Google Scholar 

  16. 16.

    Guaraldi G, Meschiari M, Cozzi-Lepri A, et al. Tocilizumab in patients with severe COVID-19: a retrospective cohort study. Lancet Rheumatol. 2020;2(8):e474–e484484.

    Article  PubMed  PubMed Central  Google Scholar 

  17. 17.

    Atal S, Fatima Z. IL-6 inhibitors in the treatment of serious COVID-19: a promising therapy? Pharm Med. 2020;34:223–31.

    CAS  Article  Google Scholar 

  18. 18.

    Coomes EA, Haghbayan H. Interleukin-6 in COVID-19: a systematic review and meta-analysis. Accessed 9 Aug 2020.

  19. 19.

    Schiff MH, Kremer JM, Jahreis A, Vernon E, Isaacs JD, van Vollenhoven RF. Integrated safety in tocilizumab clinical trials. Arthritis Res Ther. 2011;13:R141.

    CAS  Article  Google Scholar 

  20. 20.

    Phua J, Badia JR, Adhikari NK, Friedrich JO, Fowler RA, Singh JM, et al. Has mortality from acute respiratory distress syndrome decreased over time?: a systematic review. Am J Respir Crit Care Med. 2009;179:220–7.

    Article  Google Scholar 

  21. 21.

    Herold T, Jurinovic V, Arnreich C, Lipworth BJ, Hellmuth JC, von Bergwelt-Baildon M, et al. Elevated levels of IL-6 and CRP predict the need for mechanical ventilation in COVID-19. J Allergy Clin Immunol. 2020;146:128–136.e124.

    CAS  Article  Google Scholar 

  22. 22.

    Flynn MG, Markofski MM, Carrillo AE. Elevated inflammatory status and increased risk of chronic disease in chronological aging: inflamm-aging or inflamm-inactivity? Aging Dis. 2019;10:147–56.

    Article  Google Scholar 

Download references


Not applicable.


No funding was received for this work.

Author information




All co-authors contributed equally to this work. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Justyna D. Kowalska.

Ethics declarations

Ethics approval and consent to participate

Ethics approval and consent to participate were obtained.

Consent for publication

All co-authors consent for this publication.

Competing interests

All co-authors declare no conflict of interest.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit The Creative Commons Public Domain Dedication waiver ( applies to the data made available in this article, unless otherwise stated in a credit line to the data.

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Podlasin, R.B., Kowalska, J.D., Pihowicz, A. et al. How to follow-up a patient who received tocilizumab in severe COVID-19: a case report. Eur J Med Res 25, 37 (2020).

Download citation


  • SARS-CoV-2
  • COVID-19
  • Tocilizumab
  • Chloroquine
  • ARDS
  • Cytokine storm