Eligibility Criteria:
Inclusion Criteria:
* Male or female,
* Aged 18 to 65 years,
* Presenting with an acute dry or productive cough for less than 3 weeks, associated with one of the following viral conditions: Acute viral rhinitis, Acute viral rhinopharyngitis, Acute viral tonsillitis, Acute viral pharyngitis / tonsillitis,
* For patients with suspected pharyngitis/tonsillitis: McIsaac score \< 2 or a negative rapid antigen detection test for Group A beta-hemolytic Streptococcus,
* Effective contraception for female patients of childbearing potential,
* Sufficient cooperation and understanding to comply with the requirements of the trial,
* Acceptance of registration in the SI-RIPH database (Système d'Information pour la Recherche sur les Produits de Santé),
* Having received clear information and agreeing to provide written informed consent,
* Covered by the French national health insurance system
Exclusion Criteria:
* Hypersensitivity or history of allergy to any component of the investigational products,
* Severe, poorly tolerated cough,
* Complicated acute rhinitis (e.g., acute bacterial sinusitis, acute otitis media, acute bronchitis, or pneumonia),
* Chronic or allergic rhinosinusitis,
* Bacterial tonsillitis or pharyngitis,
* Positive antigen test for influenza A/B or COVID-19 requiring etiological treatment per current guidelines (Appendix 5),
* Concurrent use of antitussives, bronchodilators, inhaled corticosteroids, other pulmonary-targeted therapies, or medications known to induce cough (such as ACE inhibitors, ARBs, etc.), antibiotics, antivirals, or any other treatment deemed incompatible with the study by the investigator,
* Recent ENT surgery (\<6 months),
* Pulmonary disease (e.g., COPD, asthma),
* Immunodeficiency (based on patient declaration),
* Comorbidities or a health status judged incompatible with the trial by the investigator (e.g., Gastroesophageal Reflux Disease \[GERD\] or abnormal lung auscultation),
* Pregnant or breastfeeding women,
* Regular tobacco smoker (as judged by the investigator),
* Current participation in another clinical trial, being in an exclusion period from a previous trial, or having received total compensation exceeding 6000 euros in the 12 months prior to study start,
* Under legal protection measures (guardianship, trusteeship, deprivation of liberty, judicial safeguard).