No serious or unexpected toxicity has been observed with dydrogesterone.

Another downside to the drugs is that they often make people feel nauseated and can have serious toxicities.

No serious toxicity associated with the use of coenzyme Q10 has been reported.

Even small amounts can cause serious toxicity, including death.

Burns with areas larger than 160 cm (25 in), about the size of a man's hand, can cause serious systemic toxicity.

Cases of serious toxicity have been reported in small children.

More serious toxicity occurs with intentional ingestions by adolescents and adults.

They are, however, not devoid of serious toxicity and cases of severe coma or fatality have been reported.

Several trials have been terminated due to serious cardiovascular toxicity.

Generally, two grams cause serious toxicity and four grams are potentially lethal.