Hi,
Nausea, diarrhea and neck pain may not be related to the Parkinsons.
Yes, many medications including Levodopa, Memantine, Venlafaxime can cause such a problem.
Atorvastatin,
Levothyroxine may not be the cause as the patient is taking these for a long time.
Other reasons that need consideration are as follows:
Gastritis and GERD.
Gastroenteritis as there is diarrhea too.
Hepatitis.
Any disease can cause nausea as a secondary effect.
Hence I would advise her the following:
To get the examination done by a Doctor.
Get required investigations of blood, stool, urine and
Ultrasonography of abdomen.
All these will give a proper diagnosis and a plan of further management.
She is already taking
Omeprazole hence the need for further evaluation and management as per the clinico-pathological correlation.
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. T Chandrakant,
General Surgeon