Yes wood alcohol is methanol and it is quite toxic.

Most detox pads use food grade wood vinegar(pyroligneuos acid) however, which is safe.

Distilling wood vinegar(pyroligneous acid):

During distillation, wood is placed inside an oven and heating started. When wood is heated above 270C, it begins
a process of decomposition called cabonization. If air is absent, the final product is charcoal (since there is no oxygen present to react with the wood). If air, which contains oxygen is present, the wood wil catch fire, and burn when it reaches a temperature of 400-500C and the final product is wood ash.

If wood is heated away from air, moisture is first driven off, and until this is complete, the wood temperature remains at 100-110C. When the wood is dry, its temperature rises to about 270C, and it begins to spontaneously decompose, and heat is evolved. This is the well-known reaction which takes place during charcoal burning.

The first distillate (condensation from the gases) is almost entirely water and it is not until about the 4th hour that the liquor slowly darkens and contains increasing amounts of acid. The crude condensate produced from the distillation of wood is called pyroligneuos acid.

The crude pyroligneuos acid is then refined by fractional distillation to separate a food grade version that is suitable for use in health products.

Hope this helps.