What is a solution?
A mixture of two or more components
Forms a single phase
Homogenous
Solvent
Component determining phase of solution
Greatest proportion of system
Solute
Dissolved in solvent
Dissolution
Transfer of molecules (or ions) from a solid state into solution
Solubility
Saturation
Solution at D containing excess solute
Advantages of solution dosage forms
Easier to swallow than solids
Therapeutic response
Homogenous system
Less irritation
Disadvantages of solution dosage forms
Bulky
Stability of ingredients in solution is poor
Microorganism growth
Unpleasant taste of the drug