The card refers to the packaging: the recommended daily amount and the method of use are given there. It does not name a time of taking or combination with food. One capsule contains 1000 mg of evening primrose oil; the recommended daily amount must not be exceeded and the product should be kept out of the reach of children.
General information (not a manufacturer's instruction): if there is difficulty taking it or unpleasant sensations appear, it is worth discussing this with a doctor.