Summary of the safety profile
RA, sJIA, pJIA and CRS
The most commonly reported adverse reactions are upper respiratory tract infections, nasopharyngitis, headache, hypertension and increased ALT.
The most serious adverse reactions are serious infections, complications of diverticulitis, and hypersensitivity reactions.
COVID-19
The most commonly reported adverse reactions are hepatic transaminases increased, constipation, and urinary tract infection.
Tabulated list of adverse reactions
Adverse reactions from clinical trials and/or post-marketing experience with tocilizumab based on spontaneous case reports, literature cases and cases from non-interventional study programs are listed in Table 1 and in Table 2 by MedDRA system organ class (SOC). The corresponding frequency category for each adverse reaction is based on the following convention: very common (≥ 1/10); common (≥ 1/100 to < 1/10), uncommon (≥ 1/1,000 to < 1/100), rare (>1/10,000 to <1/1,000), very rare (<1/10,000), and frequency not known (cannot be estimated from the available data). Within each frequency grouping, adverse reactions are presented in order of decreasing seriousness.
RA patients
Table 1. List of adverse reactions occurring in patients with RA receiving tocilizumab as monotherapy or in combination with MTX or other DMARDs in the double-blind controlled period or during post-marketing experience
| MedDRA SOC | Frequency categories with preferred terms | |
| Very common | Common | Uncommon | Rare | Very rare |
| Infections and infestations | Upper respiratory tract infections | Cellulitis, Pneumonia, Oral herpes simplex, Herpes zoster | Diverticulitis | | |
| Blood and lymphatic system disorders | | Leukopenia, Neutropenia, Hypofibrinogenaemia | | | |
| Immune system disorders | | | | Anaphylaxis (fatal)1, 2 ,3 | |
| Endocrine disorders | | | Hypothyroidism | | |
| Metabolism and nutrition disorders | Hypercholesterolaemia* | | Hypertriglyceridaemia | | |
| Nervous system disorders | | Headache, Dizziness | | | |
| Eye disorders | | Conjunctivitis | | | |
| Vascular disorders | | Hypertension | | | |
| Respiratory, thoracic and mediastinal disorders | | Cough, Dyspnoea | | | |
| Gastrointestinal disorders | | Abdominal pain, Mouth ulceration, Gastritis | Stomatitis, Gastric ulcer | | |
| Hepatobiliary disorders | | | | Drug-induced liver injury, Hepatitis, Jaundice | Hepatic failure |
| Skin and subcutaneous tissue disorders | | Rash, Pruritus, Urticaria | | Stevens-Johnson-Syndrome3 | |
| Renal and urinary disorders | | | Nephrolithiasis | | |
| General disorders and administration site conditions | | Peripheral oedema, Hypersensitivity reactions | | | |
| Investigations | | Hepatic transaminases increased, Weight increased, Total bilirubin increased* | | | |
* Includes elevations collected as part of routine laboratory monitoring (see text below)
1 See section 4.3
2 See section 4.4
3 This adverse reaction was identified through post-marketing surveillance but not observed in controlled clinical trials. The frequency category was estimated as the upper limit of the 95% confidence interval calculated on the basis of the total number of patients exposed to tocilizumab in clinical trials.
Patients with COVID‑19
The safety evaluation of this medicinal product in COVID‑19 was based on 3 randomised, double‑blind, placebo‑controlled trials (studies ML42528, WA42380, and WA42511). A total of 974 patients were exposed to tocilizumab in these studies. Collection of safety data from the RECOVERY trial was limited and is not presented here.
The following adverse reactions, listed by MedDRA SOC in Table 2, have been adjudicated from events which occurred in at least 3% of tocilizumab treated patients and more commonly than that in patients on placebo in the pooled safety-evaluable population from clinical trials ML42528, WA42380, and WA42511.
Table 2. List of adverse reactions1 identified from the pooled safety-evaluable population from tocilizumab clinical trials in COVID‑19 patients2
| MedDRA SOC | Preferred Terms and frequency Common |
| Infections and infestations | Urinary tract infection |
| Metabolism and nutrition disorders | Hypokalaemia |
| Psychiatric disorders | Anxiety, Insomnia |
| Vascular disorders | Hypertension |
| Gastrointestinal disorders | Constipation, Diarrhoea, Nausea |
| Hepatobiliary disorders | Hepatic transaminases increased |
1 Patients are counted once for each category regardless of the number of reactions
2 Includes adjudicated reactions reported in studies WA42511, WA42380 and ML42528
Patients with sJIA or pJIA
Adverse reactions in the sJIA and pJIA patients treated with tocilizumab are listed in the Table 3 and presented by MedDRA SOC. The corresponding frequency category for each adverse reaction is based on the following convention: very common (≥ 1/10); common (≥ 1/100 to < 1/10) or uncommon (≥ 1/1,000 to < 1/100).
Table 3. List of adverse reactions occurring in clinical trial patients with sJIA or pJIA receiving tocilizumab as monotherapy or in combination with MTX.
| MedDRA SOC | Preferrred term (PT) | Frequency |
| Infections and Infestations | Very Common | Common | Uncommon |
| | Upper Respiratory Tract Infections | pJIA, sJIA | | |
| Nasopharyngitis | pJIA, sJIA | | |
| Nervous system disorders | | | |
| | Headache | pJIA | sJIA | |
| Gastrointestinal Disorders | | | |
| | Nausea | | pJIA | |
| Diarrhoea | | pJIA, sJIA | |
| General disorders and administration site conditions | | | |
| | Infusion related reactions | | pJIA1, sJIA2 | |
| Investigations | | | |
| | Hepatic transaminases increased | | pJIA | |
| Decrease in neutrophil count | sJIA | pJIA | |
| Platelet count decreased | | sJIA | pJIA |
| Cholesterol increased | | sJIA | pJIA |
1. Infusion‑related reaction events in pJIA patients included but were not limited to headache, nausea and hypotension
2. Infusion‑related reaction events in sJIA patients included but were not limited to rash, urticaria, diarrhoea, epigastric discomfort, arthralgia and headache
Description of selected adverse reactions
RA patients
Infections
In the 6-month controlled studies the rate of all infections reported with tocilizumab 8 mg/kg plus DMARD treatment was 127 events per 100 patient years compared to 112 events per 100 patient years in the placebo plus DMARD group. In the long‑term exposure population, the overall rate of infections with tocilizumab was 108 events per 100 patient years exposure.
In 6-month controlled clinical trials, the rate of serious infections with tocilizumab 8 mg/kg plus DMARDs was 5.3 events per 100 patient years exposure compared to 3.9 events per 100 patient years exposure in the placebo plus DMARD group. In the monotherapy study, the rate of serious infections was 3.6 events per 100 patient years of exposure in the tocilizumab group and 1.5 events per 100 patient years of exposure in the MTX group.
In the long‑term exposure population, the overall rate of serious infections (bacterial, viral and fungal) was 4.7 events per 100 patient years. Reported serious infections, some with fatal outcome, included active tuberculosis, which may present with intrapulmonary or extrapulmonary disease, invasive pulmonary infections, including candidiasis, aspergillosis, coccidioidomycosis and pneumocystis jirovecii, pneumonia, cellulitis, herpes zoster, gastroenteritis, diverticulitis, sepsis and bacterial arthritis. Cases of opportunistic infections have been reported.
Interstitial lung disease
Impaired lung function may increase the risk for developing infections. There have been post-marketing reports of interstitial lung disease (including pneumonitis and pulmonary fibrosis), some of which had fatal outcomes.
Gastrointestinal perforation
During the 6-month controlled clinical trials, the overall rate of gastrointestinal perforation was 0.26 events per 100 patient years with tocilizumab therapy. In the long-term exposure population the overall rate of gastrointestinal perforation was 0.28 events per 100 patient years. Reports of gastrointestinal perforation on treatment were primarily reported as complications of diverticulitis including generalised purulent peritonitis, lower gastrointestinal perforation, fistulae and abscess.
Infusion related reactions
In the 6-month controlled trials adverse events associated with infusion (selected events occurring during or within 24 hours of infusion) were reported by 6.9% of patients in the tocilizumab 8 mg/kg plus DMARD group and 5.1% of patients in the placebo plus DMARD group. Events reported during the infusion were primarily episodes of hypertension; events reported within 24 hours of finishing an infusion were headache and skin reactions (rash, urticaria). These events were not treatment limiting.
The rate of anaphylactic reactions (occurring in a total of 8/4,009 patients, 0.2%) was several fold higher with the 4 mg/kg dose, compared to the 8 mg/kg dose. Clinically significant hypersensitivity reactions associated with tocilizumab and requiring treatment discontinuation were reported in a total of 56 out of 4,009 patients (1.4%) treated during the controlled and open label clinical trials. These reactions were generally observed during the second to fifth infusions of tocilizumab (see section 4.4). Fatal anaphylaxis has been reported after marketing authorisation during treatment with tocilizumab (see section 4.4).
Immunogenicity
A total of 2,876 patients have been tested for anti-tocilizumab antibodies in the 6-month controlled clinical trials. Of the 46 patients (1.6%) who developed anti-tocilizumab antibodies, 6 had an associated medically significant hypersensitivity reaction, of which 5 led to permanent discontinuation of treatment. Thirty patients (1.1%) developed neutralising antibodies.
Neutrophils
In the 6-month controlled trials decreases in neutrophil counts below 1 × 109/ L occurred in 3.4% of patients on tocilizumab 8 mg/kg plus DMARDs compared to < 0.1% of patients on placebo plus DMARDs. Approximately half of the patients who developed an ANC < 1 × 109/ L did so within 8 weeks after starting therapy. Decreases below 0.5 × 109/ L were reported in 0.3% patients receiving tocilizumab 8 mg/kg plus DMARDs. Infections with neutropenia have been reported.
During the double-blind controlled period and with long-term exposure, the pattern and incidence of decreases in neutrophil counts remained consistent with what was seen in the 6-month controlled clinical trials.
Platelets
In the 6-month controlled trials decreases in platelet counts below 100 × 103/μL occurred in 1.7% of patients on tocilizumab 8 mg/kg plus DMARDs compared to < 1% on placebo plus DMARDs. These decreases occurred without associated bleeding events.
During the double-blind controlled period and with long-term exposure, the pattern and incidence of decreases in platelet counts remained consistent with what was seen in the 6-month controlled clinical trials.
Very rare reports of pancytopenia have occurred in the post-marketing setting.
Hepatic transaminase elevations
During the 6-month controlled trials transient elevations in ALT/AST > 3 × ULN were observed in 2.1% of patients on tocilizumab 8 mg/kg compared to 4.9% of patients on MTX and in 6.5% of patients who received 8 mg/kg tocilizumab plus DMARDs compared to 1.5% of patients on placebo plus DMARDs.
The addition of potentially hepatotoxic medicinal products (e.g. MTX) to tocilizumab monotherapy resulted in increased frequency of these elevations. Elevations of ALT/AST > 5 × ULN were observed in 0.7% of tocilizumab monotherapy patients and 1.4% of tocilizumab plus DMARD patients, the majority of whom were discontinued permanently from tocilizumab treatment. During the double-blind controlled period, the incidence of indirect bilirubin greater than the upper limit of normal, collected as a routine laboratory parameter, is 6.2% in patients treated with 8 mg/kg tocilizumab + DMARD. A total of 5.8% of patients experienced an elevation of indirect bilirubin of > 1 to 2 × ULN and 0.4% had an elevation of > 2 × ULN.
During the double-blind controlled period and with long-term exposure, the pattern and incidence of elevation in ALT/AST remained consistent with what was seen in the 6-month controlled clinical trials.
Lipid parameters
During the 6-month controlled trials, increases of lipid parameters such as total cholesterol, triglycerides, LDL cholesterol, and/or HDL cholesterol have been reported commonly. With routine laboratory monitoring it was seen that approximately 24% of patients receiving tocilizumab in clinical trials experienced sustained elevations in total cholesterol ≥ 6.2 mmol/ L with 15% experiencing a sustained increase in LDL to ≥ 4.1 mmol/ L. Elevations in lipid parameters responded to treatment with lipid-lowering agents.
During the double-blind controlled period and with long-term exposure, the pattern and incidence of elevations in lipid parameters remained consistent with what was seen in the 6-month controlled trials.
Skin reactions
Rare reports of Stevens-Johnson Syndrome have occurred in the post-marketing setting.
COVID-19 patients
Infections
In the pooled safety-evaluable population from trials ML42528, WA42380, and WA42511, the rates of infection/serious infection events were balanced between COVID-19 patients receiving tocilizumab (30.3%/18.6%, n=974) versus placebo (32.1%/22.8%, n=483).
The safety profile observed in the baseline systemic corticosteroids treatment group was consistent with the safety profile of tocilizumab from the overall population presented in Table 2. In this subgroup, infections and serious infections occurred in 27.8% and 18.1% of patients treated with intravenous tocilizumab and in 30.5% and 22.9% of patients treated with placebo, respectively.
Laboratory abnormalities
The incidence of laboratory abnormalities was generally similar between patients with COVID-19 who received one or two doses of tocilizumab-intravenous compared with those who received placebo in the randomised, double-blind, placebo-controlled trials with few exceptions. Decreases in platelets and neutrophils and elevations of ALT and AST were more frequent among patients receiving tocilizumab-intravenous versus placebo (see section 4.2 and 4.4).
Paediatric population
In general, the adverse reactions in pJIA and sJIA patients were similar in type to those seen in RA patients, see section 4.8.
Description of selected adverse reactions in pJIA patients
The safety profile of intravenous tocilizumab in pJIA has been studied in 188 patients from 2 to 17 years of age. The total patient exposure was 184.4 patient years. The frequency of adverse reactions in pJIA patients can be found in Table 3. The types of adverse reactions in pJIA patients were similar to those seen in RA and sJIA patients. When compared to the adult RA population, events of nasopharyngitis, headache, nausea, and decreased neutrophil count were more frequently reported in the pJIA population. Events of cholesterol increased were less frequently reported in the pJIA population than in the adult RA population.
Infections
The rate of infections in the tocilizumab all exposure population was 163.7 per 100 patient years. The most common events observed were nasopharyngitis and upper respiratory tract infections. The rate of serious infections was numerically higher in patients weighing < 30 kg treated with 10 mg/kg tocilizumab (12.2 per 100 patient years) compared to patients weighing ≥ 30 kg, treated with 8 mg/kg tocilizumab (4.0 per 100 patient years). The incidence of infections leading to dose interruptions was also numerically higher in patients weighing < 30 kg treated with 10 mg/kg tocilizumab (21.4%) compared to patients weighing ≥ 30 kg, treated with 8 mg/kg tocilizumab (7.6%).
Infusion-related reactions
In pJIA patients, infusion-related reactions are defined as all events occurring during or within 24 hours of an infusion. In the tocilizumab all exposure population, 11 patients (5.9%) experienced infusion-related reactions during the infusion and 38 patients (20.2%) experienced an event within 24 hours of an infusion. The most common events occurring during infusion were headache, nausea and hypotension and within 24 hours of infusion were dizziness and hypotension. In general, the adverse reactions observed during or within 24 hours of an infusion were similar in nature to those seen in RA and sJIA patients, see section 4.8.
No clinically significant hypersensitivity reactions associated with tocilizumab and requiring treatment discontinuation were reported.
Immunogenicity
One patient in the 10 mg/kg < 30 kg group developed positive anti-tocilizumab antibodies without developing a hypersensitivity reaction and subsequently withdrew from the study.
Neutrophils
During routine laboratory monitoring in the tocilizumab all exposure population, a decrease in neutrophil count below 1 × 109/L occurred in 3.7% of patients.
Platelets
During routine laboratory monitoring in the tocilizumab all exposure population, 1% of patients had a decrease in platelet count to ≤ 50 × 103/µL without associated bleeding events.
Hepatic transaminase elevations
During routine laboratory monitoring in the tocilizumab all exposure population, elevation in ALT or AST ≥ 3 × ULN occurred in 3.7% and < 1% of patients, respectively.
Lipid parameters
During routine laboratory monitoring in the intravenous tocilizumab study WA19977 3.4% and 10.4% of patients experienced a post-baseline elevation of their LDL-cholesterol value to ≥ 130 mg/dL and total cholesterol value to ≥ 200 mg/dL at any time during the study treatment, respectively.
Description of selected adverse reactions in sJIA patients
The safety profile of intravenous tocilizumab in sJIA has been studied in 112 patients from 2 to 17 years of age. In the 12 week double-blind, controlled phase, 75 patients received treatment with tocilizumab (8 mg/kg or 12 mg/kg based upon body weight). After 12 weeks or at the time of switching from placebo to tocilizumab, due to disease worsening, patients were treated in the open label extension phase.
In general, the adverse reactions in sJIA patients were similar in type to those seen in RA patients. The frequency of adverse reactions in sJIA patients can be found in Table 3. When compared to the adult RA population, patients with sJIA experienced a higher frequency of nasopharyngitis, decrease in neutrophil counts, hepatic transaminases increased, and diarrhoea. Events of cholesterol increased were less frequently reported in the sJIA population than in the adult RA population.
Infections
In the 12 week controlled phase, the rate of all infections in the intravenous tocilizumab group was 344.7 per 100 patient years and 287.0 per 100 patient years in the placebo group. In the open label extension phase (Part II), the overall rate of infections remained similar at 306.6 per 100 patient years.
In the 12 week controlled phase, the rate of serious infections in the intravenous tocilizumab group was 11.5 per 100 patient years. At one year in the open label extension phase the overall rate of serious infections remained stable at 11.3 per 100 patient years. Reported serious infections were similar to those seen in RA patients with the addition of varicella and otitis media.
Infusion-related reactions
Infusion-related reactions are defined as all events occurring during or within 24 hours of an infusion. In the 12 week controlled phase, 4% of patients from the tocilizumab group experienced events occurring during infusion. One event (angioedema) was considered serious and life-threatening, and the patient was discontinued from study treatment.
In the 12 week controlled phase, 16% of patients in the tocilizumab group and 5.4% of patients in the placebo group experienced an event within 24 hours of infusion. In the tocilizumab group, the events included, but were not limited to rash, urticaria, diarrhoea, epigastric discomfort, arthralgia and headache. One of these events, urticaria, was considered serious.
Clinically significant hypersensitivity reactions associated with tocilizumab and requiring treatment discontinuation, were reported in 1 out of 112 patients (< 1%) treated with tocilizumab during the controlled and up to and including the open label clinical trial.
Immunogenicity
All 112 patients were tested for anti-tocilizumab antibodies at baseline. Two patients developed positive anti-tocilizumab antibodies with one of these patients having a hypersensitivity reaction leading to withdrawal. The incidence of anti-tocilizumab antibody formation might be underestimated because of interference of tocilizumab with the assay and higher tocilizumab concentration observed in children compared to adults.
Neutrophils
During routine laboratory monitoring in the 12 week controlled phase, a decrease in neutrophil counts below 1 × 109/L occurred in 7% of patients in the tocilizumab group, and no decreases in the placebo group.
In the open label extension phase, decreases in neutrophil counts below 1 × 109/L, occurred in 15% of the tocilizumab group.
Platelets
During routine laboratory monitoring in the 12 week controlled phase, 3% of patients in the placebo group and 1% in the tocilizumab group had a decrease in platelet count to ≤ 100 × 103/µL.
In the open label extension phase, decreases in platelet counts below 100 × 103/µL, occurred in 3% of patients in the tocilizumab group, without associated bleeding events.
Hepatic transaminase elevations
During routine laboratory monitoring in the 12 week controlled phase, elevation in ALT or AST ≥ 3 × ULN occurred in 5% and 3% of patients, respectively, in the tocilizumab group, and 0% in the placebo group.
In the open label extension phase, elevation in ALT or AST ≥ 3 × ULN occurred in 12% and 4% of patients, respectively, in the tocilizumab group.
Immunoglobulin G
IgG levels decrease during therapy. A decrease to the lower limit of normal occurred in 15 patients at some point in the study.
Lipid parameters
During routine laboratory monitoring in the 12 week controlled phase (study WA18221), 13.4% and 33.3% of patients experienced a post-baseline elevation of their LDL-cholesterol value to ≥ 130 mg/dL and total cholesterol value to ≥ 200 mg/dL at any time during study treatment, respectively.
In the open label extension phase (study WA18221), 13.2% and 27.7% of patients experienced a post-baseline elevation of their LDL-cholesterol value to ≥ 130 mg/dL and total cholesterol value to ≥ 200 mg/dL at any time during study treatment, respectively.
CRS patients
The safety of tocilizumab in CRS has been evaluated in a retrospective analysis of data from clinical trials, where 51 patients were treated with intravenous tocilizumab 8 mg/kg (12 mg/kg for patients less than 30 kg) with or without additional high-dose corticosteroids for severe or life-threatening CAR T cell-induced CRS. A median of 1 dose of tocilizumab (range, 1-4 doses) was administered.
Reporting of suspected adverse reactions
Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via the Yellow Card Scheme at www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store.