- Reaction kinetics sand Its Relevance to Drug Stability is the study of rates at which chemical reactions occur. In pharmaceuticals, it helps:
- Predict how long a drug remains stable
- Design appropriate storage conditions
- Optimize formulations
- Set expiration dates
- A general rate law expresses how the rate of reaction depends on the concentration of reactants.
General Rate Law:
$\text{Rate} = -\frac{d[A]}{dt} = k[A]^n$
- Where:
- [A] = concentration of drug
- k = rate constant
- n = order of reaction (can be 0, 1, 2…)
- $\frac{d[A]}{dt}$ = rate of disappearance of An over time
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