Read the side effects of Memantine as described in the medical literature. In case of any doubt consult your doctor or pharmacist.
Central Nervous System
Sleepiness, dizziness, confusion and headache.
Shortness of breath.
Constipation and vomiting.
Hallucinations (seeing things or hearing voices that do not exist) and extreme tiredness.
Other Precautions :
*Monitor urine pH regularly.