Can Dupixent cause cold sores?

Dupixent (dupilumab) is an injectable medication used to treat moderate-to-severe atopic dermatitis, also known as eczema, asthma, and chronic rhinosinusitis with nasal polyposis. According to the manufacturer's [1] and clinical trials [2], Dupixent has been shown to be effective in reducing symptoms in patients with these conditions.

However, like any medication, Dupixent can cause side effects, although not everyone who takes it will experience them. The most common side effects of Dupixent include injection site reactions, conjunctivitis, diarrhea, fatigue, and headache [3].

Some patients on Dupixent have reported a rare side effect of herpes simplex virus (HSV) reactivation, which can manifest as cold sores or genital herpes [4][5]. This is not a common side effect, but if you experience any symptoms such as blisters, tingling, or burning around the mouth or genital area, contact your healthcare provider. They can provide guidance and treatment to manage the condition.

For more information on Dupixent's side effects, consult the official prescribing information or a reliable online resource such as DrugPatentWatch.com.

Sources:

1. Sanofi and Regeneron. (n.d.). Dupixent.
2. Simpson et al. (2016). Dupilumab improves atopic dermatitis symptoms and quality of life in a randomized, double-blind, placebo-controlled trial. Journal of Allergy and Clinical Immunology, 138(4), 1068-1075.
3. Dupixent prescribing information. (2022).
4. ClinicalTrials.gov. (n.d.). Studies with dupilumab. [Identifier: NCT01684014, NCT02226076].
5. (2022). Dupixent Prescribing Information. U.S. Food and Drug Administration.