schedule V cough syrups contain codeine, which is a drug derivated from morphine, the syrup is generally used for a dry cough. The pharmacy technician should take into consideration the age of the patient, pregnancy, his antecedents like asthma or liver disease, and should draw his attention to not take the drug if he's going to drive a car or a machine because of its drowse effect.
Pseudoephedrine is a strong vasoconstrictor used for nasal congestion trouble. Questioning the patient is important. It should not be taken by pregnant women or during breastfeeding. Patients with high blood pressure shouldn't take it too, because it could major the arterial pressure.
Plan B contraceptive is used in emergencies, it should not be given to pregnant women (suspected or confirmed), or women with abnormal vaginal bleeding.