PTCB Practice Test #6
How much sodium bicarbonate powder is needed to make 240cc of sodium bicarbonate solution at 0.10 N?
Normality is defined as the number of gram equivalent weights of solute in one liter of solution, therefore a 1N solution of sodium bicarbonate will contain 84 gms in 1000 cc. We need to know how much sodium bicarbonate is in a 240cc, 0.1 N solution:
1 N solution contains 84 gm
0.1 N solution contains ?
= 0.1 x 84 = 8.4 gms/1000cc.
240cc solution will contain:
= 240 x 8.4/1000 = 2.016 gm of NaHCO3
To make a 30 percent of 500cc alcohol solution, how many cc of 75 percent alcohol should be mixed with 10% of 1000cc alcohol?
To solve this type of problem, we need to use alligation method.
75 20 (75%)
30
10 45 (10%)
Total parts 65 (30%)
To prepare 65 (30%) 20 parts (75%) need
To prepare 500 (30%) ?
= 500 x 20/65 = 153.84cc (75%) alcohol
If we mixed 153.84 cc of 75% alcohol with 346.16cc [500cc - 153.84] of 10% alcohol, then we can get 500cc of 30% alcohol solution.
Which method is used to prepare capsules?
The punch method is used to prepare capsules by punching the open end into dry powder until filled. Wet, Dry and Beaker methods are used to prepare emulsions.
Which of the following is an error that is caused by the prescriber?
Physicians sometimes use abbreviations that are not approved or may be misinterpreted. All health care professionals will need to familiarize themselves with the TJC – Do Not Use list and ISMP Error Prone Abbreviation list. Sound alike, transcription and misinterpretation are errors caused by the pharmacy.
When performing handwashing, hands should be washed for a minimum of?
Handwashing should be done vigorously, making sure to include forearms to elbow for a minimum of 30 seconds with antimicrobial soap and water before donning gloves.
Which of the following is the maximum dose for aspirin in an adult?
4000mg or 4gm per day is the maximum adult dose and is used to treat pain, fever and inflammation. Many physicians prescribe 81 to 325mg per day for antiplatelet effects.
Which type of medication order may be filled or administered when a patient requests it?
As needed orders are filled or administered when a patient request it, but there may be limitations. STAT orders should be filled immediately or within 15 minutes. ASAP or as soon as possible. ASA stands for aspirin.
Which of the following is on the ISMP High Alert list for community and ambulatory setting?
High alert medications cause a significant and considerable harm when used in error. metFORMIN is found on the list for community settings.
A pharmacy receives a prescription for Pilocar 4% Eye Drops #15ml, i gtt both eyes bid. How many days will this bottle last?
Using the converting factor of 20gtt per ml. Multiple 20 x 15 = 300. Divide product 300 by 4 = 75.
Which of the following represents the cost the pharmacy paid for the medication?
The actual acquisition cost is what the pharmacy paid for the medication. DAW is dispense as written and are used for brand name medication; AWP is average wholesale price and is the price the wholesalers sell a medication; MAC is maximum allowable cost is used in calculating the reimbursement formula for generic medication.
Which of the following can be flagged or alerted using patient monitoring functions?
Therapeutic duplication identifies medications with the same indications or in the pharmacological class. Date written, brand/generic and drug classification are used to track prescriptions.
Which of the following containers protects the contents from other solids?
A well closed container protect contents from solids and from loss of the article under normal conditions. Light resistant is used to protect from the effects of light. Tamper evident is used to seal that containers. Tight container protect from contamination by liquids.
What would the retail price of 30 Risperdal 1 mg tablets be if 1000 tablets cost $ 2250 and the percent markup on prescription is 20%?
Risperdal 1mg tablets cost $ 2250 for 1000 tablets. The percentage markup on prescriptions is 20%.
As a result, the retail price of 1000 tablets would be as follows:
** For each $ 100 cost = $120 retail cost** = 120 x 2250/100 = $ 2700
The cost of 30 tablets would be:
$ 81 = 30 x 2700/1000
Which of the following is a role of the United States Pharmacopeia?
US Pharmacopeia publishes and oversees USP-NF which contains standards for biological and chemical drugs substances, as well as standards for food ingredients and dietary supplements.
In a 0.9 percent 250cc normal saline solution, how many meq of Na+ are present? [Na+ = 23, Cl- = 35.5]
In 250 cc of 0.9 percent NaCl, there is a certain amount of sodium chloride.
2.25 gram NaCl = 250 x 0.9/100
Na+ = weight in grams = total equivalents
wt equivalent
0.03846 equivalents = 2.25/58.5
What is the percent of hydrocortisone in the final combination if 60 gm of 1% hydrocortisone is mixed with 80 gm of 2.5 % hydrocortisone?
Hydrocortisone concentration in 60 gm: 1%
Hydrocortisone (60/100) = 0.6 gram
2.5 percent hydrocortisone content in 80 gram
2 gm hydrocortisone = 80 x 2.5/100
the amount of hydrocortisone in the final combination as a percentage
= 100 x 2.6 (2gm + 0.6gm)/140 (80gm + 60gm)
= 1.85% w/w.