12.    The following can be administered orally:                                                                              1.        Benzylpenicillin2.        Procaine benzylpenicillin3.       Benzathine benzylpenicillin4.        Phenoxymethylpenicillin5.        Methicillin

The following increase the half-life of a drug except:                                           1.        Diminished renal flow as result of a heart failure2.        Decreased extraction ratio as in renal disease3.        Decreased metabolism4.        Increased protein binding5.        Increased metabolism

The following drug is classified as a selective Cyclooxygenase (COX-2 inhibitor):     1.        Celecoxib2.        Tramadol3.        Morphine4.        Paracetamol5.       Diazepam

The following anticancer drug is classified as an antimetabolite:                       1.       Chlorambucil2.       Cyclophosphamide3.       Ifosfamide4.       Methotrexate5.       Melphalan

The following is classified as β-lactam antimicrobial agents:                              1.       Glycopeptides2.       Lincosamides3.       Macrolides4.        Aminoglycosides5.        Cephalosporins

The following are classified as protein synthesis inhibitors except:       1.       Aminoglycoside2.       Lincosamides3.       Macrolides4.       Tetracyclines5.       Sulphonamides

The following is a therapeutic use of morphine:                                                                1.        Lactic acidosis2.        Amenorrhoea3.        Galactorrhoea4.        Nausea and vomiting5.       Pain

The absorption of the following drugs from the gastrointestinal tract is reduced by food  containing milk products:                                                                                                          1.       Chloramphenicol2.       Amoxicillin3.       Clarithromycin4.       Doxycycline5.       Metronidazole

The following opioid is classified as ultra-short acting:                                                    1.        Morphine2.        Pethidine3.        Tramadol4.        Fentanyl5.       Remifentanil

The opposite of a dehydration synthesis reaction is a hydrolysis reaction.