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So, for example, digoxin has a half-life (or t 1 / 2 ) of 24–36 h; this means that a change in the dose will take the best part of a week to take full effect. For this reason, drugs with a long half-life (e.g., amiodarone , elimination t 1 / 2 of about 58 days) are usually started with a loading dose to achieve their desired ...
The elimination half-life is how long it takes for half of the drug to be eliminated by the body. "Time to peak" refers to when maximum levels of the drug in the blood occur after a given dose. "Time to peak" refers to when maximum levels of the drug in the blood occur after a given dose.
Due to passive diffusion, free drug will leave the peripheral compartment (i.e. tissues) and enter the central compartment, replenishing any drug that was metabolised from the plasma; If steady state is not reached, context-sensitive half-life is shorter than elimination half-life Only free drug that is in the plasma is metabolised
Triazolam is usually used for short-term treatment of acute insomnia and circadian rhythm sleep disorders, including jet lag. It is an ideal benzodiazepine for this use because of its fast onset of action and short half-life. It puts a person to sleep for about 1.5 hours, allowing its user to avoid morning drowsiness.
Metabolism may be abnormal in certain disease states, and accumulation may occur even with normal dosage. [medical citation needed] NSAIDs can also be divided into short-acting (plasma half-life less than 6 h) such as aspirin, diclofenac and ibuprofen and long-acting (half-life approximately greater than 10 h) such as naproxen, celecoxib. [156]
Despite its relatively short half-life, the drug is reported to remain effective for motion sickness for 12 - 24 hours. [23] Meclizine has low bioavailability (22–32%) and a delayed onset to action in part due to its poor solubility in water (0.1 mg/ml) and gastrointestinal fluid. [ 1 ]
Of the bisphosphonate that is resorbed (from oral preparation) or infused (for intravenous drugs), about 50% is excreted unchanged by the kidney. The remainder has a very high affinity for bone tissue, and is rapidly adsorbed onto the bone surface. Once bisphosphonates are in bone, they have a very long elimination half-life that can exceed ten ...
The elimination half-life of the drug is 12,5 hours and 34-54% of the drug is excreted unchanged in the urine. [23] Anastrozole is administered orally and has a standard daily dose of 1 mg. Anastrozole has good oral bioavailability and is rapidly absorbed. It takes 2–3 hours for the drug to reach maximum serum concentration.