Does and frequency of administration of drug is determined by?

The dose and frequency of administration of a drug are determined by several factors, including the drug's pharmacokinetics (absorption, distribution, metabolism, and excretion), the intended therapeutic effect, the patient's age, weight, and overall health, as well as potential drug interactions and side effects. Clinical guidelines and research studies also play a crucial role in establishing optimal dosing regimens. Ultimately, the goal is to achieve the desired therapeutic effect while minimizing adverse effects.