Major Neurologic Adverse Drug Reactions, Potential Drug–Drug Interactions and Pharmacokinetic Aspects of Drugs Used in COVID-19 Patients with Stroke: A Narrative Review
Received 22 April 2020
Accepted for publication 10 June 2020
Published 30 June 2020 Volume 2020:16 Pages 595—605
Checked for plagiarism Yes
Review by Single anonymous peer review
Peer reviewer comments 2
Editor who approved publication: Professor Garry Walsh
Parisa Ghasemiyeh,1,2 Afshin Borhani-Haghighi,3 Iman Karimzadeh,1 Soliman Mohammadi-Samani,2,4 Afsaneh Vazin,1 Anahid Safari,5 Adnan I Qureshi6
1Department of Clinical Pharmacy, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran; 2Pharmaceutical Sciences Research Center, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran; 3Clinical Neurology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran; 4Department of Pharmaceutics, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran; 5Stem Cells Technology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran; 6Zeenat Qureshi Stroke Institute and Department of Neurology, University of Missouri, Columbia, MO, USA
Correspondence: Afshin Borhani-Haghighi
Clinical Neurology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
Abstract: Stroke has been considered as one of the underlying diseases that increases the probability of severe infection and mortality. Meanwhile, there are ongoing reports of stroke subsequent to COVID-19 infection. In this narrative paper, we reviewed major neurologic adverse drug reactions (ADRs) and pharmacokinetics of drugs which are routinely used for COVID-19 infection and their potential drug–drug interactions (PDDIs) with common drugs used for the treatment of stroke. It is highly recommended to monitor patients on chloroquine (CQ), hydroxychloroquine (HCQ), antiviral drugs, and/or corticosteroids about initiation or progression of cardiac arrhythmias, delirium, seizure, myopathy, and/or neuropathy. In addition, PDDIs of anti-COVID-19 drugs with tissue plasminogen activator (tPA), anticoagulants, antiaggregants, statins, antihypertensive agents, and iodine-contrast agents should be considered. The most dangerous PDDIs were interaction of lopinavir/ritonavir or atazanavir with clopidogrel, prasugrel, and new oral anticoagulants (NOACs).
Keywords: SARS-CoV-2, COVID-19, stroke, potential drug–drug interactions, adverse drug reactions, pharmacokinetics
The coronavirus disease 2019 (COVID-19) pneumonia pandemic has spread all over the globe with considerable morbidity and mortality. The severe disease might occur in healthy individuals of any age, but it mostly occurs in adults with older age or predisposing medical comorbidities such as heart disease, diabetes mellitus (DM), hypertension (HTN), chronic lung disease, neoplasm, chronic renal failure.1
More than one-third of patients who required intensive care unit (ICU) admission had at least one underlying vascular risk factor.2 In addition to respiratory symptoms, COVID-19 can also lead to hematological and cardiac complications. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection has been reported to be associated with myocarditis, and cardiac arrhythmias.3 Meanwhile, there are reports of hypercoagulable state in COVID-19 infection. There are also reports of increased D-dimer and fibrin degradation products (FDP) in patients with COVID-19 infection, particularly those with severe disease.4,5
Apart from the respiratory system as the predominant target of the virus, angiotensin-converting enzyme 2 (ACE2)) receptor, a key cell surface protein facilitating COVID-19 entry to the cells, is found in various cells including vascular endothelium and neurons.6 The possible association between stroke and SARS-CoV-2 infection appears to be complex and bidirectional. Stroke has been considered as one of the underlying diseases that increase the probability of severe infection and mortality. Among cases with fatalities, 15.4% had cerebral infarction.7 Up to 11% of hospitalized patients with COVID-19 infection suffer from stroke.8 The reported mortality is much higher in individuals with both COVID-19 infection and stroke than that observed in patients with stroke who do not have COVID-19 infection.9 There are ongoing reports of stroke subsequent to COVID-19 infection. In an unpublished report from China, acute ischemic stroke, cerebral venous sinus thrombosis, and intracerebral hemorrhage were observed in 11, 1, and 1 out of 221 COVID-19 patients, respectively. In patients with ischemic stroke, 6 took aspirin or clopidogrel and 5 received enoxaparin.10 In another Chinese case report, 3 patients with COVID-19 infection and multiple infarcts were reported. The authors considered coagulopathy and antiphospholipid antibodies as the major contributing factors.11
Medication errors (MEs) and adverse drug reactions (ADRs) are among the major causes of morbi-mortality in the medical wards and ICUs.12 Potential drug–drug interactions (PDDIs) are among the preventable causes of MEs. Considering suitable alternative drugs, dose modification, and monitoring clinical presentations of ADRs by doctors and clinical pharmacists may decrease PDDIs.13 It has been shown that PDDIs are common among hospitalized patients in the neurology wards, especially among those receiving multiple medications.14 In this narrative paper, we reviewed major neurologic ADRs, the pharmacokinetics of medications with potential anti-COVID-19 activity, and their PDDIs with common drugs used for the treatment of stroke.
Literature were searched on Pubmed, Scopus, Google Scholar, and Web of Science databases using the key search terms COVID-19, SARS-CoV-2, neurologic ADRs, stroke, cerebrovascular disease, and PDDIs from 1971 until April 2020. In this regard, first titles and abstracts of peer-reviewed articles were reviewed. This search strategy was limited to human studies that were published in the English language.
COVID-19 infection and stroke both have a relatively high risk of renal impairment and perhaps even show higher risk when both occur together. In a prospective cohort project on 701 patients with COVID-19 pneumonia infection,15 acute kidney injury (AKI) was observed in 5.1% of hospitalized patients. The rate of AKI was much higher than the 1–2% rate reported among all hospitalizations in China.16 AKI is also relatively common and seen in 10% of patients with ischemic stroke and 20% of patients with hemorrhagic stroke.17
According to Table 1, suitable drug selection should be considered especially in COVID-19 patients with the predisposing disease based on pharmacokinetic aspects of drugs. For example, umifenovir which is mainly metabolized via liver should be used with caution in patients with underlying hepatic disease.
Table 1 A Brief Pharmacokinetic Data of Potential Drugs Used in COVID-19 Management20
Since chloroquine (CQ) and hydroxychloroquine (HQC) have a narrow therapeutic index and toxicity could be occurred with cardiovascular events, these agents should be used with caution in patients with underlying cardiovascular disease.18 CQ in patients who are consuming heparin could enhance the risk of bleeding. Also, CQ in patients who are on digoxin could cause cardiac block.19
Adverse Drug Reactions (ADR)
Potential drugs which are used in COVID-19 pneumonia management have many neurologic ADRs, some of these most important adverse events are listed in Table 2.
Table 2 The Common Central Nervous System (CNS) and Peripheral Nervous System (PNS) Adverse Effects of Drugs Used in COVID-19 Management
Major Neurologic Adverse Drug Reactions (ADRs)
Chloroquine (CQ)/Hydroxychloroquine (HCQ) ADRs
There are several reports of CQ/HCQ-induced Parkinsonism, oculogyric crisis, and dystonias.43 Another report revealed that extrapyramidal syndrome might also occur after the administration of a single standard dose of CQ.44
Previous studies revealed that CQ could induce psychotic features such as mood disorder (mixed episode), irritability, anxiousness, agitation, and blunted mood. These psychotic features were more common accompanied by positive symptoms, hallucination, and derealization. Also, results revealed that the severity of these hallucinations and psychotic features are not dose-dependent.45
Myopathy related to CQ/HCQ consumption is a type of reversible vacuolar myopathy. Clinical presentation of this myopathy is very non-selective and patients may experience a mild to moderate muscle weakness, which may also be a common presentation of COVID-19 and creatinine kinase (CK) elevation. This myopathy is poorly related to the dose or duration of CQ/HCQ therapy but it might be related to the predisposing connective tissue disorders and long-term corticosteroid consumption. Other potential risk factors of CQ/HCQ-induced myopathy are renal failure, Caucasian ethnicity, and co-administration of statins, proton pump inhibitors, and other myotoxic agents.48
It has been reported that CQ/HCQ could induce heart failure, cardiac conductive disorders, and hypertrophic cardiomyopathy which are reversible and could be recovered after discontinuation of therapy. It seems that these cardiac reactions are dose-dependent and also more common in patients with underlying renal failure.49,50
CQ and HCQ (less likely) could also be associated with QT-prolongation and QT-related malignant arrhythmias. Both CQ and HCQ, which are potential agents in COVID-19 management, are metabolized through CYP3A4. In COVID-19 management, if CQ or HCQ administered in combination with antiviral agents (such as lopinavir/ritonavir, atazanavir, remdesivir) or azithromycin which are CYP3A4 inhibitors, the risk of QT-prolongation and drug-induced cardiac death would be enhanced.50,51
Maculopathy and retinopathy are dose-dependent adverse effects of CQ, especially in the elderly groups, which could be enhanced due to the drug accumulation process. These side effects are more common in total daily doses of over 4 mg/kg/day.52 Since the duration of CQ/HCQ therapy; in COVID-19 patients is short, these ADRs are not restrictive.
Ototoxicity has been reported both with CQ53 and less frequently with HCQ.54 This ADR may induce hearing loss, tinnitus, vertigo, and disequilibrium. Accordingly, CQ/HCQ ototoxicity may mimic stroke in patients with COVID-19 infection.
Because of these systemic adverse effects related to oral administration of CQ and HCQ, a hypothesis has been suggested that an aerosol formulation of HCQ with a dosage of 2 to 4 mg per inhalation dose, which is one-hundredth of the oral dose, would be considered as an alternative to obtain HCQ therapeutic level in epithelial cells. This low dose formulation with a non-systemic route of administration may minimize adverse drug reactions related to CQ therapy in COVID-19 patients. This novel dosage form might be mostly beneficial in patients with predisposing diseases, elderly groups, and poly-pharmacy patients.55
The most common adverse events related to lopinavir/ritonavir are gastrointestinal adverse effects such as diarrhea, nausea, and vomiting. But other serious adverse reactions such as AKI, respiratory failure, or secondary infection were not observed in patients treated with lopinavir/ritonavir.56
Tocilizumab might cause vascular disorders such as hypertension. Also, it could induce nervous system disorders such as headache, demyelinating disorders, leukoencephalopathy with cognitive impairment, and peripheral neuropathy.57 A serious adverse effect reported with tocilizumab is increasing the risk of fungal and bacterial infections which should be considered in COVID-19 patients.
Although tocilizumab is not metabolized by the CYP3A4 isoenzyme system, enhanced IL-6 levels had been observed in inflammatory conditions, would inhibit these enzymes, so results in slowing the metabolism of drugs through these pathways. Since CYP3A4 isoenzyme is responsible for the metabolism of many medications, administration of IL-6 inhibitors, such as tocilizumab, could enhance the metabolism of drugs metabolized through the CYP3A4 system such as lopinavir, ritonavir, and atazanavir.
Corticosteroids could induce psychiatric adverse reactions. Corticosteroid-induced psychosis mostly occurrs as a dose-dependent adverse effect but idiosyncratic psychotic reactions were also observed.58–60 Since acute psychotic features (ex, delusion and visual or auditory hallucinations) might occur in older patients who have had a stroke,61 pay attention to these adverse reactions of corticosteroids in COVID-19 patients who had developed to ARDS with predisposing cerebrovascular diseases is highly crucial.
Corticosteroids could induce convulsion through central mineralocorticoid receptors. This ADR is very rare but it should be considered because of its high clinical importance.62 Since seizure is one of the post-stroke complications, so in COVID-19 patients with predisposing cerebrovascular diseases such as stroke, close monitoring during steroid therapy is strongly recommended. The potential mechanism of post-stroke seizure would be the reduction of tonic inhibition.63
Corticosteroid consumption could induce mood changes such as anxiety, agitation, and depression.64 Generalized anxiety disorder, agitation, and depression are common post-stroke complications.65 So, neurologists and clinical pharmacists should be aware of these precipitating ADRs in COVID-19 pneumonia patients with ARDS and history of stroke managed with corticosteroids.
Steroid myopathy is related to high dose corticosteroid administration and prolonged exposure to steroids. Acute steroid myopathy is a rare but clinically important adverse effect of high dose steroid therapy that presents with muscular pain and weakness.66 Since this adverse reaction might also be occurred in COVID-19 patients, so close patient monitoring during steroid therapy is highly essential.
Umifenovir (Arbidol) could induce adverse effects of dizziness and psychiatric symptoms but generally considered safe and could be well-tolerated. Remdesivir is also a well tolerated agent with few serious adverse reactions. Favipiravir might rarely induce drug-related psychotic symptoms.
Angiotensin Converting Enzyme II (ACE2) and COVID-19
ACE2 receptor is extensively expressed in various organs such as lungs, intestine, kidneys and blood vessels. It is also presented on the surface of different cells involved in the immune response.67 The higher circulating amount of ACE2 was also reported in patients with DM, HTN, and cardiovascular disease (CVD).68 It has been hypothesized that ACEIs and angiotensin receptor blockers (ARBs) may increase the possibility of COVID-19 infection or aggravation of its course.68,69 However, the Heart Failure Society of America, the American Heart Association, and also the American College of Cardiology recommended that ACEIs and/or ARBs could be continued in patients with robust indications.70
Potential Drug–Drug Interactions (PDDIs)
Based on Infectious Diseases Society of America (IDSA) Guidelines 2020 on the Treatment and Management of Patients with COVID-19 Infection, CQ/HCQ, fixed dose of lopinavir/ritonavir, tocilizumab, and convalescent plasma could be considered in COVID-19 management in the context of clinical trials. Other drugs that are also under investigation are favipiravir and remdesivir for the management of COVID-19 especially in critically ill patients. Some Chinese guidelines are also suggest nebulized interferon-alpha and oral umifenovir (Arbidol) for the treatment of COVID-19, also many supportive therapies have been considered.71–73 Also, results of recent studies have revealed that teicoplanin and ivermectin would be promising agents but clinical trials are required to confirm their safety and efficacy in COVID-19 pneumonia management.74,75 As many off-label treatments of COVID-19 infections are performed by poly pharmacy with the hope of treatment of a cureless disease, investigation of PDDIs becomes more important.
Table 3 demonstrated a list of PDDIs between drugs used in COVID-19 pneumonia management and common drugs that are used in patients with predisposing cerebrovascular disease. According to Table 3, 20,76 in COVID-19 patients with cerebrovascular disease who are taking clopidogrel, ticagrelor, and NOACs such as rivaroxaban, administering lopinavir/ritonavir and atazanavir are not suitable for COVID-19 management because of the presence of major drug–drug interactions between these drugs. In these patients, interferon-alpha or other antiviral agents such as favipiravir and remdesivir would be better choices to avoid further complications. Cardiovascular drugs have potential major interactions with antiretroviral agents, so they should be considered by clinicians and clinical pharmacists. Suitable dose modification or alternative drug selection should be taken into account in these cases.77 Possible mechanisms and types of X-category drug–drug interactions and management of these interactions have been shown in Table 4.
Table 3 Potential Drug–Drug Interactions in COVID-19 Patients with Predisposing Cerebrovascular Diseases
Table 4 Possible Mechanisms, Types of Interactions, and Management of X-Category Drug–Drug Interactions
As it is seen both CQ and HCQ, antiviral agents, and corticosteroids could induce delirium. Delirium occurs very commonly in older hospitalized patients.78 The frequency of delirium in stroke patients (13%- 48%) is higher than in patients who are admitted to general internal medicine wards (10%-25%).79 Also, stroke patients have higher mortality and longer hospital stay. Early recognition and prevention of delirium should be considered in patients with stroke and COVID-19 infection.80 Pharmacological and non-pharmacological strategies should be considered for the management of delirium. In addition, most importantly PDDIs should be monitored and addressed by clinical pharmacists and neurologists. There are anecdotal and published results of increased prevalence of seizure in patients with COVID-19 infection.81 About 5%–20% of stroke victims may develop to seizure.82 A decreased threshold of seizure in patients with stroke and COVID-19 infection who receive CQ, HCQ, or corticosteroids should be kept in mind. Metabolic disorders such as hypo/hypernatremia, hypo/hyperglycemia, uremia, and hypocalcemia, which decrease the threshold of seizure activity, should be corrected. The probability of non-convulsive status epilepticus as a cause of altered mental function in the patients with COVID-19 infection should also be considered. As patients with COVID-19 infection and stroke may experience prolonged ICU admission, they are susceptible to critical illness myopathy, neuropathy, or polyneuromyopathy and consequently prolonged mechanical ventilation.83 Among drugs that have been used for treatments of COVID-19 infection, CQ, HCQ, antivirals, and corticosteroids may induce myopathy and/or neuropathy. Therefore, ADR of these drugs may contribute to failure to wean from ventilators.
As conclusion, in patients with stroke and COVID-19 infection who are taking drugs according to trials or humanitarian use, it is highly recommended to monitor patients to avoid the occurence or progression of cardiac arrhythmias, delirium, seizure, myopathy and/or neuropathy. In addition, PDDIs of anti-COVID-19 drugs with tPA, anticoagulants, antiaggregants, statins, antihypertensive agents, and iodine-contrast agents should be considered. The most harmful PDDIs were interaction of Lopinavir/Ritonavir or Atazanavir with clopidogrel, prasugrel, and NOACs. In these situations, early intervention of neurologists and clinical pharmacists is essential to avoid further disabling toxicity complications.
All authors made substantial contributions to conception and design, acquisition of data, or analysis and interpretation of data; took part in drafting the article or revising it critically for important intellectual content; gave final approval of the version to be published; and agree to be accountable for all aspects of the work.
The authors have no conflict of interest.
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