Waking thirsty or uncomfortable can make you wonder whether you should change what you drink before bed. A small practical adjustment may help with access, but nighttime symptoms deserve more care than a blanket instruction to drink extra electrolytes.
Make your existing plan easier
Keep a manageable drink within reach on a stable surface if that suits your care plan. A spill-resistant container may be helpful if lifting a glass is difficult. Arrange a clear, well-lit route to the bathroom, and use any mobility supports you normally need.
If late drinks repeatedly interrupt sleep with bathroom trips, mention the pattern to your clinician. Fluid timing may need individual advice, particularly if you have a prescribed fluid limit or take medicines affecting urination or blood pressure.
Do not assume the cause
A racing heart at night is not automatically dehydration. Recurrent or changing palpitations need medical assessment. Palpitations that do not settle, or occur with chest pain, breathlessness, faintness, or fainting, require urgent emergency evaluation. The NHS palpitations guidance describes these warning signs; use your local emergency service.
Keep brief notes about when symptoms occur and what accompanies them, without making yourself monitor every sensation all night. Bring those notes to your care team. The aim is a safer, more comfortable routine based on your needs, not another remedy you have to experiment with alone at two in the morning.