Usually, minor symptoms clear up within a couple of days. Diarrhoea, for example, is known as a 'self-limiting' illness since it will usually resolve itself in a couple of days. If symptoms persist, then it could be a sign of something more serious.
Be sure to listen carefully to what your customers tell you
Refer anyone who has prolonged symptoms to your pharmacist, as well as customers:
- Whose symptoms keep coming back
- Whose symptoms are severe
- You are otherwise concerned about.