The word "couple" is always followed by the preposition "of".
eg: A couple of days. eg: A couple of paracetamols. eg: A couple of minutes.
Note the choice of language when the pharmacist says "I think you've probably just eaten something a bit rich for you." The word "rich" refers to food that has a large amount of strongly flavoured ingredients and therefore means food that feels unusually "heavy" after it has been eaten.
"Have you taken...?" is a question that is asked twice in the clip. This is a typical example of the present perfect simple tense (question form). Note that a past participle “taken” is used after the question "Have you". The question is asking the customer whether at any period of time in the past the customer has taken (consumed) any medication. Medical words: indigestion, paracetamols
Possible problematic words: bottled, sips, hardly, couple, plenty,
Expressions: “worn out” – very tired, “terribly” – very, “all right” – well again