Yes Nembutal may be ingested orally and still result in a fatal outcome, provided the correct dosage is taken under the right conditions. It does not require iv administration to be effective. In most medically assisted protocols, particularly those followed in Switzerland, the drug is consumed orally typically in a bitter solution of around 100ml at a concentration of 100mg/ml, amounting to roughly 10 grams of pentobarbital. If you took 50ml and survived, it is likely the dose was insufficient, or other factors such as vomiting, food intake, metabolic rate, or sedative tolerance interfered with absorption. Nembutal acts as a cns depressant, and in adequate amounts leads to unconsciousness, followed by respiratory arrest. But when the dose is sub lethal, as may be the case here, it can result in prolonged sedation, organ damage, or other complications without achieving the intended effect. It is crucial to stress that survival in such cases is not an indication that the method is ineffective, but rather that the execution was incomplete.