Alcohol, sedating medication and fever before a night trip
At 23:30, after a funeral in Bissau, you are expected to drive your wife and 8-year-old son 25 km home. Between 20:00 and 21:30 you drank two bottles of beer. At 22:00, because of an allergic reaction, you took a 4 mg chlorphenamine tablet; the label says it may cause drowsiness. You also have a fever of 38.5 °C, a headache and a dry mouth. You are yawning repeatedly and your eyes feel heavy. The car is a 2010 Renault with working lights and a valid inspection sticker. A friend offers strong coffee and says the police rarely stop cars at that hour. Your wife can drive but has not driven at night for two years and does not have her licence with her. The route includes unlit stretches and a checkpoint on the airport road. Your son is already asleep in the back seat.
1. Assess your fitness to drive and decide what you should do.
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You should not drive. Two beers between 20:00 and 21:30 may leave alcohol in your system at 23:30, and alcohol slows reaction and reduces judgement. On top of that, chlorphenamine is a sedating antihistamine, and the label warns of drowsiness; fever, headache, dry mouth and repeated yawning show that you are already impaired. The effects combine rather than cancel out. Guinea-Bissau law prohibits driving under the influence of alcohol, but the practical test is fitness: you cannot reliably monitor speed, pedestrians or unlit stretches. Hand the keys to someone else, stay overnight, or take a taxi. Do not start the 25 km trip and hope to manage.
2. Your friend says coffee and the low chance of police checks make it fine. Your wife can drive but has no licence with her. How do you weigh these options?
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Coffee does not remove alcohol or reverse sedation; it only makes a tired, impaired driver more alert for a short time. The low chance of a checkpoint is irrelevant, because the risk is a crash, not a fine. Your wife is the better option only if she is licensed, fit and confident enough for the unlit route; not carrying the licence is an administrative problem that can be dealt with later, but driving without being fit is not. If she is not comfortable, stay or call a taxi. The safest plan is the one that keeps you out of the driver's seat until you have slept and the medication and fever have passed.
3. Suppose you ignored the advice and, after 10 km, you are fighting to keep your eyes open. What do you do?
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Treat that as an emergency warning. Do not open the window, turn up the radio or push on to the next town. Signal, slow down, and pull off the road at the first safe place, well away from the traffic lane; avoid stopping on a blind bend or in a narrow shoulder. Switch on hazard lights, stay with the vehicle, and call someone who is fit to drive, or wait and sleep. Do not let a passenger who has been drinking take over. If you are on an unlit stretch, keep the doors locked and use your phone to arrange help. Continuing while fighting sleep is the highest-risk choice.