Neurological symptoms after starting Mercaptopurine?

Has anyone experienced this?

Started pretty much immediately...the first 24 hours in taking the 1st dose of mercaptopurine.  First thing was vision changes.  Sorta like when the eye doc dilates your eyes? A little traily-like too?

Numbness in the feet/hands. Pins n' needles type feeling in arms & legs.

And the weirdest thing so far...feels like an ice cube is running  down & up your arm? (right arm)

So I don't know if I'm just on TOO MANY MEDS...and maybe there's an ineraction somewhere, or if this is a common thing.

Sometimes I feel I don't know when to open my mouth about something or to ignore it!!!!

Any experience is much appreciated. Thanks. 

Some of the adverse reactions of taking Mercaptopurine might include diarrhea, nausea, vomiting, loss of appetite, stomach/abdominal pain, weakness, skin rash, darkening of the skin, or hair loss. Serious adverse reactions include mouth sores, fever, sore throat, easy bruising or bleeding, pinpoint red spots on the skin, yellowing of eyes or skin, dark urine, painful or difficult urination. Unlikely but serious side effects include: black or tarry stools (melena), bloody stools, and bloody urine.

Symptoms of allergic reaction to Mercaptopurine include rash, itching, swelling, dizziness, trouble breathing.

Mercaptopurine causes myelosuppression, suppressing the production of white blood cells. It may be toxic to bone marrow. Weekly blood counts are recommended for patients on mercaptopurine. The patient should stop taking the medication at least temporarily if there is an unexplained, abnormally large drop in white blood cell count, or any other blood count.

Patients who exhibit myelosuppression or bone marrow toxicity should be tested for Thiopurine methyltransferase (TPMT) enzyme deficiency. Patients with TPMT deficiency are much more likely to develop dangerous myelosuppression. In such patients it may be possible to continue using mercaptopurine, but at a lower dose.