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The procedure is to take the child's weight in pounds, divide by 150 lb, and multiply the fractional result by the adult dose to find the equivalent child dosage.For example, if an adult dose of medication calls for 30 mg and the child weighs 30 lb, divide the weight by 150 (30/150) to obtain 1/5 and multiply 1/5 times 30 mg to get 6 mg.
Colchicine is typically prescribed to mitigate or prevent the onset of gout, or its continuing symptoms and pain, using a low-dose prescription of 0.6 to 1.2 mg per day, or a high-dose amount of up to 4.8 mg in the first 6 hours of a gout episode. [14] [26] With an oral dose of 0.6 mg, peak blood levels occur within one to two hours. [50]
Continuing the maintenance dose for about 4 to 5 half-lives (t 1/2) of the drug will approximate the steady state level. [1] One or more doses higher than the maintenance dose can be given together at the beginning of therapy with a loading dose. [2] A loading dose is most useful for drugs that are eliminated from the body relatively slowly ...
[1] The formula for determining the dose is: [1] If there is a single recommended maintenance dose in the literature, this is preferred. If there are a range of recommended maintenance doses then If the literature recommends generally increasing from initial to maximum dose provided it is tolerated, pick the maximum dose.
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.
The importance of determining the therapeutic range of a drug cannot be overstated. This is generally defined by the range between the minimum effective dose (MED) and the maximum tolerated dose (MTD). The MED is defined as the lowest dose level of a pharmaceutical product that provides a clinically significant response in average efficacy ...
For many drugs, severe toxicities in humans occur at sublethal doses, which limit their maximum dose. A higher safety-based therapeutic index is preferable instead of a lower one; an individual would have to take a much higher dose of a drug to reach the lethal threshold than the dose taken to induce the therapeutic effect of the drug.
A combination drug (or fixed-dose combination; FDC) is a product that contains more than one active ingredient (e.g., one tablet, one capsule, or one syrup with multiple drugs). In naturopathy , dosages can take the form of decoctions and herbal teas , in addition to the more conventional methods mentioned above.