1. Consult Your Doctor: Before taking an extra dose of Ventidox-M, consult your healthcare provider. They can determine if it's safe for your asthma condition.

2. Medication Purpose: Ventidox-M is typically taken regularly, not on an as-needed basis. It combines a bronchodilator and a leukotriene receptor antagonist to manage asthma symptoms.

3. Avoid Self-Medication: Extra doses without medical advice can lead to side effects or complications.

4. Manage Asthma Triggers: Since your asthma worsens in March and April, likely due to allergens, ensure you have your regular medications and rescue inhalers ready.

5. Emergency Plan: Carry your asthma action plan and know when to seek urgent medical help if symptoms worsen.

In summary, do not take an extra dose of Ventidox-M without consulting your doctor. Proper asthma management and medical guidance are essential for safe travel.