These treatments were used as part of a basket of drugs to treat covid as people were dying and there was NO treatment.
They were off the shelf treatments that doctors prescribed, they then reported the effects to the drug companies
About 30% of all drugs prescribed (USA) are "off the shelf" ie never specifically tested for the use they were given for
Both of these drugs have been used (for people) for many, many years and are still are in frequent use throughout the world today, so dosage and the minimal side effects are well known
