Antibiotics are required to have a full dosage regimen from three to seven days to stop or kill the infection. Maintenance medications as amlodipine, losartan, nifedipine etc. and the anti- diabetics are strictly to be taken daily to control blood pressure and sugar respectively. In addition, in order to calm down an acid reflux condition, a Prilosec or Nexium should be taken for fourteen days.
The citations mentioned have definite dosage instructions to ensure positive results.
The signa PRN or as needed, simply instructs the patient to take the medicine ONLY when he needs it. A NSAID for example like the mefenamic – an analgesic is usually taken 3 times a day. However, when a physician jots down PRN, he instructs the patient to take the drug once a symptom of pain is experienced. The maximum dosing of mefenamic maybe three times a day but once the relief is achieved with the single take, the consumption of the following dose is not necessary anymore.
‘As needed’ means, don’t take an antipyretic if you do not have a fever or do not take Plasil if you are not experiencing a vomiting tendency.
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