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Talimogene laherparepvec Side Effects

Medically reviewed by Last updated on Jul 30, 2023.

Applies to talimogene laherparepvec: injection suspension.

Serious side effects

Along with its needed effects, talimogene laherparepvec may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor or nurse immediately if any of the following side effects occur while taking talimogene laherparepvec:

More common

Incidence not known

Other side effects

Some side effects of talimogene laherparepvec may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

For Healthcare Professionals

Applies to talimogene laherparepvec: injectable suspension.


-The most commonly reported (25% or more) adverse drug reactions were fatigue, chills, pyrexia, nausea, influenza-like illness, and injection site pain.

-Pyrexia, chills, and influenza-like illness can occur at any time during treatment, but were more frequent during the first 3 months.

-Most adverse reactions were mild or moderate in severity and generally resolved within 72 hours.

-Cellulitis was the most common grade 3 or higher adverse reaction.[Ref]


Very common (10% or more): Fatigue (50.3%), chills (48.6%), pyrexia (42.8%), influenza-like illness (30.5%), injection site pain (27.7%)

Common (1% to 10%): Decreased weight

Frequency not reported: Herpetic infection, injection site complications (cellulitis, systemic bacterial infection, impaired healing)[Ref]


Very common (10% or more): Nausea (35.6%), vomiting (21.2%), diarrhea (18.8%), constipation (11.6%)

Common (1% to 10%): Abdominal pain

Frequency not reported: Oral herpes[Ref]

Nervous system

Very common (10% or more): Headache (18.8%)

Common (1% to 10%): Dizziness[Ref]


Very common (10% or more): Myalgia (17.5%), arthralgia (17.1%), extremity pain (16.4%)[Ref]


Frequency not reported: Immune-mediated events (glomerulonephritis, vasculitis, pneumonitis, psoriasis, vitiligo)[Ref]


Frequency not reported: Plasmacytoma[Ref]


Common (1% to 10%): Oropharyngeal pain[Ref]


Common (1% to 10%): Decreased weight[Ref]


1. Product Information. Imlygic (talimogene laherparepvec). Amgen USA. 2015.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.