Hello, Most common causes of Post nasal drip are Allergic Rhinitis and Sinonasal pathologies like Sinusitis, Polyposis.
You can take Tab. Montek LC daily for 5 days at bedtime initially.
Kindly get CT PNS done to rule out any Sinonasal pathologies.
Next Steps
CT PNS and to consult ENT specialist online or in clinic.
Health Tips
Avoid Refrigerated food items,
Avoid Allergens