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The usual dose for seizure disorder is titrated from 100-125 mg/day up to a maintenance dose of 750-1,500 mg/day (maximum daily dosage is 2 g). [15] Open-label case series have suggested that primidone is effective in the treatment of epilepsy.
An equianalgesic chart is a conversion chart that lists equivalent doses of analgesics (drugs used to relieve pain). Equianalgesic charts are used for calculation of an equivalent dose (a dose which would offer an equal amount of analgesia) between different analgesics. [1]
This medication has shown the same beneficial effects in reducing tremors as propranolol and is recommended for use based on guidelines from the American Academy of Neurology and the MDS Task Force on Tremor. The initial dose of primidone is recommended at 25 mg per day and should be increased up to the maximum dose of 250 mg per day.
The maximum dose is used, rather than a lower dose, to reduce the number of test subjects (and, among other things, the cost of testing), to detect an effect that might occur only rarely. This type of analysis is also used in establishing chemical residue tolerances in foods. Maximum tolerated dose studies are also done in clinical trials.
The defined daily dose (DDD) is a statistical measure of drug consumption, defined by the World Health Organization (WHO) Collaborating Centre for Drug Statistics Methodology. It is defined in combination with the ATC Code drug classification system for grouping related drugs. The DDD enables comparison of drug usage between different drugs in ...
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.
The EC 50 of a quantal dose response curve represents the concentration of a compound where 50% of the population exhibit a response, [5] after a specified exposure duration. For clarification, a graded dose response curve shows the graded effect of the drug (y axis) over the dose of the drug (x axis) in one or an average of subjects.
Here are links to possibly useful sources of information about Primidone. PubMed provides review articles from the past five years (limit to free review articles ) The TRIP database provides clinical publications about evidence-based medicine .