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At steady state, the systemic exposure for armodafinil is 1.8 times the exposure observed after a single dose. The concentration-time profiles of the (R)-(−)-enantiomer following a single dose of 50 mg Nuvigil or 100 mg Provigil (modafinil being a 1:1 mixture of (R)-(−)- and (S)-(−)- enantiomers
Acute use (1–3 days) yields a potency about 1.5× stronger than that of morphine and chronic use (7 days+) yields a potency about 2.5 to 5× that of morphine. Similarly, the effect of tramadol increases after consecutive dosing due to the accumulation of its active metabolite and an increase of the oral bioavailability in chronic use.
Modafinil, sold under the brand name Provigil among others, is a central nervous system (CNS) stimulant and eugeroic (wakefulness promoter) medication used primarily to treat narcolepsy, [3] [8] [15] a sleep disorder characterized by excessive daytime sleepiness and sudden sleep attacks. [16]
Provigil Nevirapine [citation needed] Norfloxacin [14] Oseltamivir [citation needed] Oxicams [7] Ampiroxicam, Piroxicam, Tenoxicam, Droxicam, Lornoxicam, Meloxicam, Isoxicam: Paracetamol [15] [16] Acetaminophen, Panadol, Tylenol Penicillins [5] Phenytoin [5] Rivoraxaban [17] Xarelto: Sitagliptin [citation needed] Sulfonamides [2] Tetracycline [2
In single-dose scenarios, the patient's body weight and the drug's recommended dose per kilogram are used to determine a safe one-time dose. If multiple doses of treatment are needed in a day, the physician must take into account information regarding the total amount of the drug which is safe to use in one day, and how that should be broken up ...
Time course of drug plasma concentrations over 96 hours following oral administrations every 24 hours (τ). Absorption half-life 1 h, elimination half-life 12 h. Biological half-life ( elimination half-life , pharmacological half-life ) is the time taken for concentration of a biological substance (such as a medication ) to decrease from its ...
Dosing generally applies to feeding chemicals or medicines when used in small quantities. For medicines the term dose is generally used. In the case of inanimate objects the word dosing is typical. The term dose titration, referring to stepwise adjustment of doses until a desired level of effect is reached, is common in medicine.
Modafinil sulfone has been described as inactive, [1] and similarly to modafinil acid, does not appear to contribute to the wakefulness-promoting effects of modafinil. [2] [3] [4] However, like modafinil, modafinil sulfone was found to show anticonvulsant properties in animals, indicating that it does possess some biological activity. [5] [6] [7]