Resperidone is a drug used in the treatment of schizophrenia. Itselimination rate constant is 0.0167hr-1, and its volume of distribution is7 L/kg. How long will it take to reach steady state if the patient startedtaking 0.25mg every 12 hoursa. 9 daysb. 2 weeksc. 5 daysd. 2 days

A 29-year-old man presents to his primary care physician complaining of dysuria, urgency, and painful ejaculation. The patient has a past medical history of allergic rhinitis. Physical examination reveals a tender prostate. The patient is given a prescription of sulfa- methoxazole to be taken daily (q 12 h) for 30 days. The half-life is 12 h. How long will it take for the medication to reach 90% of its final steady state level? * (A) 10 h (B) 20h (C) 30 h (D) 48 h (E) 50h

Quinidine sulphate (F= 0.8, k=0.1/hr, and Vd = 180L) is a class IAantiarrhythmic drug. Barbiturates are enzyme inducers that canenhance the elimination of quinidine by 50% (k=0.15/hr). What will bethe average steady state concentration in a patient who is taking 300mgq 8hr quinidine alone and in a different patient who is taking the samedose of quinidine with barbiturates?

The rate at which a certain drug is eliminated by the body follows first-order kinetics, with a half life of 73 minutes.Suppose in a particular patient the concentration of this drug in the bloodstream immediately after injection is 1.3/μgmL. What will the concentration be 146 minutes later?Round your answer to 2 significant digits.

The rate at which a certain drug is eliminated by the body follows first-order kinetics, with a half life of 57 minutes.Suppose in a particular patient the concentration of this drug in the bloodstream immediately after injection is 1.9/μgmL. What will the concentration be 228 minutes later?Round your answer to 2 significant digits.μgmL

Phenytoin must be administered at a rate no faster than 50 mg/min. How many minutes would it take to administer 1 g?