Hello , what can I do for you today ?   Well , I ’ Ve got a terrible stomach-ache and I keep needing the toilet .   I see . Well , with those symptoms maybe you ’ Ve got food poisoning . What have you eaten recently ?   Well , I went to a seafood restaurant last night and I ate lots of oysters .   Hmm . It may be those then , especially if they were raw . Well , I ’ ll give you these tablets and you should feel fine by tomorrow . 