**Medications that do not require a prescription** can have **negative effects on driving**. Although they do not require a prescription, many of these medications, such as **analgesics**, **cough suppressants**, and **antihistamines**, can cause **drowsiness**, **dizziness**, **lack of concentration**, and **loss of reflexes**. These effects can affect the ability to drive safely.

It is important to be aware of the effects of any medication being taken. It is recommended to **consult a doctor** or visit a **Driver Recognition Medical Center** to ensure it is safe to drive under the influence of these medications. Additionally, one should avoid **mixing alcohol with medications**, as this can increase the negative effects.

Therefore, even if a medication does not require a prescription, it is essential to know its possible adverse effects and take precautions when driving.