When a doctor prescribes a medication for you ask about possible negative effects of the drug on driving because
a.) there can be some potentially dangerous side effects on legally prescribed drugs

b.) there are not any side effects listed on the medication or through the pharmacist

c.) you might lose your health insurance

d.) it might affect your rising insurance rates otherwise

The answer is "a.) There can be some potentially dangerous side effects on legally prescribed drugs".

Drugs are of worry at any age. They may cause reactions that contrarily influence our driving capacity.  

The symptoms from a few drugs (obscured vision, perplexity, failure to think, laziness, unsteadiness or general muscle shortcoming) may progressively turn out to be increasingly articulated with age, and may hence truly influence our driving. Since our bodies will in general back off as we wind up more established, it takes more time for impacts of drugs to wear off after we have quit taking them.