Ketek can cause paresthesia (listed as a rare side-effect), which is abnormal sensations (such as prickling, burning, tingling, etc.). Could also be due to an interaction between Ketek and one of your other medications. You might want to discuss this with your pharmacist and doctors.
And there is also the possibility of this being a herx...
I hope this helps - take care,
Chronic Lyme Disease, Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, Anemia, Lymphopenia, intermittant Pancytopenia, chronic malabsorption/malnutrition, etc.; G-J Tube; Currently TPN-dependent.
Meds: Zofran, Pulmicort, Vitamin B12 Shots, Heparin (to flush PICC line).