Planning an overseas holiday this summer? The UK government is urging British travellers to be aware of the dangers of methanol poisoning.The warning comes after reports of British nationals becoming seriously ill or dying after unknowingly consuming alcohol tainted with methanol in popular tourist destinations.The UK government has now added warnings about methanol poisoning to its travel advice for 29 destinations, including popular holiday hotspots such as Indonesia, Laos and Vietnam."We are working to raise awareness of the warning signs of methanol poisoning and urge anyone who suspects they may have been exposed to seek immediate medical attention, helping British nationals stay safe overseas," said Minister for Consular Hamish Falconer MP.He urged travelers to check the latest travel advice before departure and act immediately if they suspect methanol poisoning.UK Launches 'Know the Signs' CampaignAlso read: Cyclospora Parasite: CDC, FDA Trace Outbreak In 5 States To Taco Bell Lettuce SupplierAs part of its 'Know the Signs' campaign, the Foreign, Commonwealth & Development Office (FCDO) has released new videos featuring the families and friends of British nationals who died after unknowingly drinking methanol-contaminated alcohol overseas.The campaign includes first-hand testimonies from survivors and bereaved families to raise awareness of the warning signs and encourage travelers to seek urgent medical help if methanol poisoning is suspected."No one expects a holiday to end in tragedy, yet methanol poisoning can have devastating—and sometimes fatal—consequences. The courage of survivors and bereaved families in sharing their experiences will help raise awareness and could save lives," Falconer added.What Is Methanol?Methanol is a highly toxic industrial alcohol that can sometimes be present in counterfeit, illegally produced or contaminated alcoholic drinks.As little as 30 ml—about one shot—can be fatal for an adult, while even smaller amounts can cause permanent blindness, brain damage and other life-threatening complications.One of the biggest dangers is that there is no reliable way to tell whether alcohol has been contaminated. Symptoms often do not appear until 12 to 24 hours after drinking, delaying life-saving treatment.Know the Warning SignsRead More: Botulism Cases Surge in UK: MHRA Issues Botox Safety Warning Over Rare Life-Threatening Side Effect Early symptoms of methanol poisoning may resemble ordinary alcohol intoxication or a hangover, making it easy to miss.Warning signs include:Nausea and vomitingDizzinessConfusionSevere headacheBlurred or disturbed visionDifficulty breathingVision problems and breathlessness typically develop 12 to 48 hours after consuming contaminated alcohol.Anyone experiencing these symptoms after drinking alcohol abroad should seek emergency medical attention immediately, as early treatment can be life-saving.How to Reduce Your RiskThe UK government advises travellers to:Buy alcohol only from reputable bars, restaurants, hotels and licensed retailers.Choose sealed bottles or cans whenever possible.Avoid homemade, bootleg or street-sold alcohol.Do not accept free shots or cocktails from unknown sources.Be cautious of unusually cheap or heavily discounted alcoholic drinks claiming to be premium brands.Take extra care with spirit-based drinks served as shots, cocktails, buckets or "on the rocks."Check the latest travel advice before travelling.The FCDO has also encouraged British travelers to familiarize themselves with the symptoms before travelling and to consult official travel advice for their destination.