How do I deal with poison in Shipwrecked?

To cure the effects of poison you need to consume Anti Venom:

Anti Venom is an item from Don't starve Shipwrecked. It is used to remove the Poison debuff. Crafting an Anti Venom requires 1 Venom Gland, 3 Seaweed, and 2 Coral. It is a single use item.

It is said that Snake Oil will, in due time when it gets a function, also cure poison.

Snake Oil is a very rare drop from normal Snakes and Poison Snakes.

It (currently) has no functionality or effect.

It is presumed to be an alternative to antivenom when it gets a function.