Inland taipan may include headache, nausea, vomiting, abdominal pain, diarrhoea, dizziness, collapse or convulsions leading to major organ effects: neurotoxicity, coagulopathy, rhabdomyolysis or renal failure/damage and finally death. Inland taipan snake venom contains potent presynaptic neurotoxins (toxins in venom that cause paralysis or muscle weakness). Also present are postsynaptic neurotoxins, which are less potent but more rapid acting than the presynaptic neurotoxins. Presynaptic neurotoxins disrupt neurotransmitter release from the axon terminal. This takes days to resolve and does not respond to antivenom. Postsynaptic neurotoxins competitively block acetylcholine receptors but the effect can be reversed by antivenom. Neurotoxic envenoming causes a progressive descending
Coastal taipan is exceeded in length among venomous snakes only by the Asiatic king cobra, African black mamba, and genus "Lachesis" (bushmasters) of the American neotropics. The head of the coastal taipan is long and narrow like that of the African black mamba ("Dendroaspis polylepis"), but without the "coffin" shape. The two species are strongly convergent in several aspects of morphology, ecology and behaviour. "O. scutellatus" has an angular brow and is lighter-coloured on the face. The body is slender and colouration can vary. It is often uniformly light olive or reddish-brown in colour, but some specimens may be dark gray to