How many liters will the nurse administer?The patient returns from the postanesthesia care unit (PACU) with the following order: morphine 3 mg IV every 2 hours as needed for relief of pain. Thus there are 250 mg/388.48 mg/mmol = 0.644 mmol of Penicillin V ion per tablet.The following discussion and calculations have therapeutic implications in preparations of dosage forms intended for ophthalmic, subcutaneous, intravenous, intrathecal, and neonatal use.Cells of the body, such as erythrocytes, will neither swell nor shrink when placed in a solution that is isotonic with the body fluids. How many ml will you administer?

If the substance is a hydrate, its anhydrous equivalent weight may need to be calculated. The administration set delivers 20 drops per mL. Using the ratio and proportion method, 500 mg/5 mL = 346 mg/X mL; cross-multiplying yields 3.46 mL for the nurse to administer.The physician orders acetaminophen (Tylenol) 15 mg/kg q4 hours PRN (as needed) for pain. Some mild CNS excitement and GI disturbances are not uncommon when starting therapy and generally resolve with chronic admin­istration in conjunction with monitoring and dosage adjustments.Dogs and cats can exhibit symptoms of nausea and vomiting, insomnia, increased gastric acid secretion, diarrhea, polyphagia, polydipsia, and polyuria.

See Expressed values are considered significant to the last digit shown (seeA zero in a quantity such as 298.0 mL is a significant figure and implies that the measurement has been made within the limits of 297.95 and 298.05 with a possible error calculated as follows: 29.8 mL = 29.8 ± 0.05 mL (accurate to the nearest 0.1 mL)29.80 mL = 29.80 ± 0.005 mL (accurate to the nearest 0.01 mL)29.800 mL = 29.800 ± 0.0005 mL (accurate to the nearest 0.001 mL)The degree of accuracy in the last example is greatest.
Theophylline (1,3‑dimethylxanthine), a bronchodilator, is widely used to treat patients with asthma, apnea (temporary asphyxia), and other obstructive lung diseases. How many milliliters of intake will the nurse document?1 ounce = 30 mL.

Volume of the diluent required = (2 mL of suspension) What is the volume of dry powder cefonicid, if 2.50 mL of diluent is added to 1 g of powder to make a solution having a concentration of 325 mg per mL? To determine this childs dosage multiply weight and 15 mg/kg (5.45 kg 15 mg/kg = 81.75 mg/dose). The interrelationships between various units within the different weighing and measuring systems are also important and have to be understood.The pharmacist must be able to calculate the amount or concentration of drug substances in each unit or dosage portion of a compounded preparation at the time it is dispensed. The nurse is calculating a drug dosage and converting from milligrams to grams. The nurse knows that the usual adult dose is 10 mg tid. How much of the drug will the nurse prepare?To determine amount to prepare: 500 mg/1 mL = 250 mg/X.

Upon exposure to air (carbon dioxide), aminophylline will absorb carbon dioxide, lose ethylenediamine and liberate free theophylline which can precipitate out of solution.
Before proceeding with any calculation, pharmacists should do the following: (a) read the entire formula or prescription carefully; (b) determine which materials are needed; and then (c) select the appropriate methods of preparation and the appropriate calculation.There are often several ways to solve a given problem. 750 mg 3 = 250 mg/dose. Product Choice.

For the acute treatment of severe episodes, 2.5 to 5 mg initially every 20 minutes for 3 doses, then 2.5 to 10 mg every 1 to 4 hours as needed, or 10 to 15 mg/hour by continuous nebulization. They also have weak chronotropic and inotropic action, stimulate the CNS and can cause respiratory stimulation (centrally-mediated).– The theophyllines are used primarily for their bronchodilitory effects, often in patients with myocardial failure and/or pulmonary edema.

Neonatal and geriatric patients may have decreased clearances of theophylline and be more sensitive to its toxic effects. (A) 650 mg (B) 65 mg (C) 217 mg (D) 20 mg 6. Hyperthermia may be treated with phenothiazines and tachycardia treated with propranolol if either condition is considered life-threatening. The provider has ordered 32 units of Humulin insulin to be taken each morning. The medication is supplied in 500-mg tablets.

How many pills should the nurse teach the patient to take every morning?0.25 mg/1 tablet = 0.125 mg dose/X. Finally, use the ratio and proportion method to calculate how to prepare the medication: 160 mg/5 mL = 81.75 mg/X mL; cross-multiplying yields 2.5 mL. Using the weight percent equation above, the calculation is as follows.Total weight of the solution = 10.00 g + 2.50 g = 12.50 g.Weight percent of phenol = (2.50 g × 100%)/12.50 g = 20.0% of phenol.Weight percent of glycerin = (10 g × 100%)/12.50 g = 80.0% of glycerin.What quantities should be used for this prescription? The infant weighs 12 pounds.