drowsiness

There can be short-term headaches, blurred vision, vomiting, slurred speech, drowsiness or confusion and memory, balance, mood or sleep problems.

Not only do these medicines come with a risk of side effects like drowsiness, constipation and nausea but longer-term use can lead to physical dependence with a greater risk of overdose.

Exposure to cyanide salts can cause headache, nausea, dizziness, nervousness, confusion, changes in heart rate and drowsiness, according to PHE.

In the future, the researchers say their noncontact sensors could be used to help people who are unable to speak or use sign language communicate or even detect drowsiness when driving.

Symptoms of cannabis poisoning can include dizziness, confusion, nausea, loss of coordination and balance, drowsiness and hallucinations.