Can you use Ponstan after expire date?

Yes, but be cautious.

The expiry date on most medicines concerns their strength.

Medicines lose their effectiveness after their expiry date - it drops off slowly, depending on the product.

If the expiry date was recent, they will probably still be 'quite' effective, but just not 'as' effective.

DO NOT overcompensate by taking more than the recommended dose, but if they don't seem effective, buy new rather than exceeding the dosage.