Medical Editor: John P. Cunha, DO, FACOEP Last updated on RxList: 12/14/2021
Kivexa Side Effects Center

Medical Editor: John P. Cunha, DO, FACOEP

What Is Kivexa?

Kivexa (abacavir and lamivudine) is a combination of antiviral drugs called nucleoside analogues that is indicated in antiretroviral combination therapy for the treatment of Human Immunodeficiency Virus (HIV) infection in adults and adolescents from 12 years of age. Epzicom is the name for the drug equivalent in the U.S.

What Are Side Effects of Kivexa?

Common side effects of Kivexa include:

Dosage for Kivexa

The recommended dose of Kivexa tablets in adults and adolescents is one tablet once daily.

What Drugs, Substances, or Supplements Interact with Kivexa?

Kivexa may interact with methadone, retinoids, sorbitol-containing medicines, trimethoprim/sulfamethoxazole, and emtricitabine. Tell your doctor all medications and supplements you use.

Kivexa During Pregnancy or Breastfeeding

Tell your doctor if you are pregnant or plan to become pregnant before using Kivexa; it is unknown how it would affect a fetus. It is unknown if Kivexa passes into breast milk. Breastfeeding is not recommended because of the potential for HIV transmission from mother to child.

Additional Information

Our Kivexa (abacavir and lamivudine) Film-Coated Tablets Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.


A Timeline of the HIV/AIDS Pandemic See Slideshow
Kivexa Professional Information


KIVEXA tablets contain abacavir and lamivudine, therefore adverse events would be expected to be similar to those experienced by patients on separate preparations of lamivudine and abacavir. For many of the adverse events listed it is unclear whether they are related to specific antiretroviral agents, or the wide range of other medications taken by HIV-infected patients, or whether they are a result of the underlying disease process.

Description Of Selected Adverse Effects

Hypersensitivity to abacavir (see Section WARNINGS AND PRECAUTIONS).

Abacavir hypersensitivity reaction (HSR) has been identified as a common adverse reaction with abacavir therapy. The signs and symptoms of this hypersensitivity reaction are listed below. These have been identified either from clinical studies or post marketing surveillance. Those reported in at least 10% of patients with a hypersensitivity reaction are in bold text.

Almost all patients developing hypersensitivity reactions will have fever and/or rash (usually maculopapular or urticarial) as part of the syndrome, however, reactions have occurred without rash or fever. Other key symptoms include gastrointestinal, respiratory or constitutional symptoms such as lethargy and malaise.

Skin: rash (usually maculopapular or urticarial)

Gastrointestinal tract: nausea, vomiting, diarrhoea, abdominal pain, mouth ulceration

Respiratory tract: dyspnoea, cough, sore throat, adult respiratory distress syndrome, respiratory failure

Miscellaneous: fever, fatigue, malaise, oedema, lymphadenopathy, hypotension, conjunctivitis, anaphylaxis

Neurological/psychiatry: headache, paraesthesia

Haematological: lymphopenia

Liver/pancreas: elevated liver function tests, hepatic failure

Musculoskeletal: myalgia, rarely myolysis, arthralgia, elevated creatine phosphokinase

Urology: elevated creatinine, renal failure

Restarting abacavir following an abacavir HSR results in a prompt return of symptoms within hours. This recurrence of the HSR is usually more severe than on initial presentation, and may include life-threatening hypotension and death. Reactions have also occurred infrequently after restarting abacavir in patients who had only one of the key symptoms of hypersensitivity (see above) prior to stopping abacavir; and on very rare occasions have also been seen in patients who have restarted therapy with no preceding symptoms of a HSR (i.e., patients previously considered to be abacavir tolerant).

For details of clinical management in the event of a suspected abacavir HSR see Section WARNINGS AND PRECAUTIONS.

Clinical Trial Data

Table 1 lists the most common adverse events, occurring at an incidence of 5% or more, reported in the controlled pivotal clinical trial CNA30021, irrespective of the investigator's assessment of possible relationship to the study drug:

Many of the adverse events listed occur commonly (nausea, vomiting, diarrhoea, fever, lethargy, rash) in patients with abacavir hypersensitivity. Therefore, patients with any of these symptoms should be carefully evaluated for the presence of this hypersensitivity reaction. If KIVEXA tablets have been discontinued in patients due to experiencing any one of these symptoms and a decision is made to restart abacavir, this must be done only under direct medical supervision (see Special considerations following an interruption of KIVEXA therapy in Section WARNINGS AND PRECAUTIONS).

Table 1: Most Common (Greater than or equal to 5% Incidence) Grade 2 to 4 Adverse Events (Safety Population - CNA30021)

Adverse Event ABC once/day
n (%)
ABC twice/day
n (%)
Subjects with ANY Grade 2 to 4 AE 267 (70%) 276 (72%)
Drug hypersensitivity 35 (9%) 27 (7%)
Insomnia 26 (7%) 36 (9%)
Depression 25 (7%) 26 (7%)
Diarrhea 21 (5%) 25 (6%)
Nausea 21 (5%) 25 (6%)
Headache 21 (5%) 21 (5%)
Rash 21 (5%) 19 (5%)
Fatigue 20 (5%) 29 (8%)
Dizziness 19 (5%) 19 (5%)
Pyrexia 19 (5%) 13 (3%)
Abnormal dreams 15 (4%) 19 (5%)
Anxiety 12 (3%) 20 (5%)

Table 2: Grade 3 to 4 Treatment Emergent Laboratory Abnormalities (Safety Population - CNA30021)

Grade 3 and 4 Laboratory Abnormalities ABC once/day
ABC twice/day
Clinical Chemistry Gr 3 Gr 4 Gr 3-4 Gr 3 Gr 4 Gr 3-4
Elevated ALT 14 (4%) 9 (2%) 23 (6%) 18 (5%) 6 (2%) 24 (6%)
Elevated AST 10 (3%) 13 (3%) 23 (6%) 9 (2%) 5 (1%) 14 (4%)
Alkaline phosphatase 1 (<1%) 0 1 (<1%) 0 1 (<1%) 1 (<1%)
Amylase 13 (3%) 2 (<1%) 15 (4%) 12 (3%) 0 12 (3%)
Bilirubin 0 2 (<1%) 2 (<1%) 1 (<1%) 1 (<1%) 2 (<1%)
Creatine kinase 13 (3%) 31 (8%) 44 (12%) 13 (3%) 22 (6%) 35 (9%)
Creatinine 0 0 0 0 1 (<1%) 1 (<1%)
Glucose 4 (1%) 1 (<1%) 5 (1%) 5 (1%) 0 5 (1%)
Sodium 2 (<1%) 0 2 (<1%) 1 (<1%) 0 1 (<1%)
Triglycerides 13 (3%) 5 (1%) 18 (5%) 13 (3%) 8 (2%) 21 (6%)
Hemoglobin 0 1 (<1%) 1 (<1%) 0 0 0
Neutrophils absolute 6 (2%) 3 (<1%) 9 (2%) 4 (1%) 1 (<1%) 5 (1%)
Platelets 2 (<1%) 0 2 (<1%) 2 (<1%) 0 2 (<1%)
WBC 0 0 0 1 (<1%) 0 1 (<1%)

Postmarketing Data

In addition to the adverse events included from clinical trial data, the following adverse events listed in Table 3 below have been identified during post-approval use of abacavir and lamivudine. These events have been chosen for inclusion due to a potential causal connection to abacavir and/or lamivudine.

Table 3: Adverse Events Identified Post Approval

Body system Abacavir Lamivudine
Blood and lymphatic systems disorde   Very rare: pure red cell aplasia
Metabolism and nutrition disorders Common: hyperlactataemia
Rare: lactic acidosis1
Common: hyperlactataemia
Rare: lactic acidosis1
Nervous system disorders   Very rare: paraesthesiae, peripheral neuropathy has been reported although a causal relationship to treatment is uncertain
Gastrointestinal disorders Rare: pancreatitis, but a causal relationship to abacavir is uncertain Rare: rises in serum amylase, pancreatitis, although a causal relationship to lamivudine is uncertain
Skin and subcutaneous tissue disorders Common: rash (without systemic symptoms)
Very rare: erythema multiforme, Stevens-Johnson syndrome and toxic epidermal necrolysis
Common: alopecia
Musculoskeletal and connective tissue disorders   Common: arthralgia,muscle disorders
Rare: rhabdomyolysis

Reporting suspected adverse reactions after registration 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 at

Read the entire FDA prescribing information for Kivexa (Abacavir and Lamivudine Film-coated Tablets)


What is HIV? See Answer

© Kivexa Patient Information is supplied by Cerner Multum, Inc. and Kivexa Consumer information is supplied by First Databank, Inc., used under license and subject to their respective copyrights.

Health Solutions From Our Sponsors