<span>If a person's body becomes so accustomed to a particular drug that it can only function normally if the drug is present, that person is <u>dependent </u>on the drug.
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The addictive substance is called Nicotine.
Smooth muscles are from <span>Involuntary muscles </span>
Oxybutynin
This is one of the most common medicines used to treat an over active bladder - it relaxes the bladder muscles to help decrease the frequency at which the prescribed patient would need to urinate
