6-14. 6-15. 6-16. 6-17. 6-18. 6-19. 6-20. Drug therapy used to treat manic-depressive patients may include 1. diazepam 2. lithium 3. hydroxizine hydrochloride 4. flurazepam Muscle  relaxants  include  all  of the  following  EXCEPT 1. methocarbamol 2. diazepam 3. cyclobenzaprine hydrochloride 4. flurazepam Occasionally used for cardiac the drug used primarily to  prevent  erection  in postcircumcision adult males in 1. nitroglycerin 2. digitoxin 3. amyl  nitrite 4. epinephrine Digitoxin  increases  the  force  of cardiac contraction by acting on the 1. vagus  nerve 2. valves  of  the  heart 3. heart  muscle 4. blood  vessels An appropriate drug to administer to a patient suffering an asthma attack is 1. amyl  nitrite 2. epinephrine 3. phenylephrine hydrochloride 4. atropine The agent used to treat pernicious  anemia  is 1. cyanocobalamin 2. ascorbic  acid 3. vitamin  D 4. vitamin  K The drug often used in conjunction with isoniazid therapy is 1. pyridoxine hydrochloride 2. thiamine   hydrochloride 3. cyanocobalamin 4. retinol 6-21. 6-22. 6-23. The vitamin deficiency associated with night blindness is 1. vitamin  A 2. vitamin B₆ 3. vitamin  B₁₂ 4. vitamin K The vitamin involved in absorption and use of calcium and  phosphorus  is 1. vitamin  A 2. vitamin B₁ 3. vitamin C 4. vitamin D Pellagra is a result of a diet deficient  in 1. carotene 2. thiamine 3. riboflavin 4. niacin 6-24. The general anesthesia agent 6-25 6-26 most-commonly  used  in  dentistry is 1. nitrous  oxide 2. halothane 3. lidocaine   hydrochloride 4. sodium   thiopentate On what area of the body is proparacaine  hydrochloride  most widely used as a topical anesthetic? 1. Eyes 2. Ears 3. Nose 4. Throat Drugs that inhibit glandular secretions  are  known  as 1. parasympathetic 2. parasympatholytics 3. sympathomimetics 4. sympatholytics 6-27.   An antispasmotic also used to treat  peptic  ulcer  disease  is 1. atropine 2. propantheline   bromide 3. propranolol   hydrochloride 4. methocarbamol 35