List of plants poisonous to equines. Paterson's Curse has been responsible for the deaths of many horses. Many plants are poisonous to equines; the species vary depending on location, climate, and grazing conditions. In many cases, entire genera are poisonous to equines and include many species spread over several continents.
A number of prescription and over-the-counter medications can interfere with or cause loss of memory. Possible culprits include: antidepressants, antihistamines, anti-anxiety medications, muscle relaxants, tranquilizers, sleeping pills, and pain medications given after surgery. Alcohol, tobacco, or drug use.
Temporary memory loss may be caused by an infection or another illness. Illnesses of any kind can be lack of concentration causes, because the ill person is too distracted by the symptoms or by worry to pay close attention.. Physical Health Problems. High blood pressure is one of the physical health problems that can cause memory loss. High blood pressure can eventually cause heart disease or stroke. Heart disease and stroke make it harder to remember things and they are lack of concentration causes. Diabetes is a chronic health problem.