### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
For 17 months, Ive had off and on problems with numbness, tingling and pain in the left foot. At first it was also in the calf and so we thought it was a calf strain plus nerve radiculopathy from my low back (Im permanently disabled post failed back surgery syndrome and nerve troubles). However, after the calf improved (6-7 months), I began to have the same problems in both the left AND right feet and ankles, radiating at times up to the right knee on the tibia and mid-tibia on the left. After seeing a second neurologist in February and getting prescribed Nuerontin and with no clearer diagnosis than it was somehow from the back (and no new testing), I began to question why for the past two weeks, its not only been worse in the evening, but it can be bothering me a lot in the morning as well. I looked Perindopril (ACE inhibitor) that Im on for hbp and saw that its not a frequent, but a possible side effect - muscle weakness, tingling, numbness, etc. It made me ask my regular doctor to do a blood test for potassium level and she also wrote for me to have a Doppler test on the calf. However, the symptom that started this morning is whats concerning me. A regularly, pulsating, short throb in the right calf. Feels like a heartbeat/small throb, but strong enough to be quite painful. Im to have the blood test done tomorrow, but the Doppler not until Tuesday. Meanwhile the leg keeps throbbing and I cant rest. What is it safe to take to help this? Im already on 1/2 patch of 35 microgram/hour pain med (Buprenorfin) and 1/2 mg Rivotril (Clonazepan) each night (+ 400 mg Neurontin at night) for the back/nerve pain, but thats not cutting the throb in the calf. Ibuprofen OK?

### output:

Hi friend, Welcome to Chat Doctor Ibuprofen is a Non-Steroidal Anti-Inflammatory Chat Doctor.  But beware! - NSAID can have effects on stomach, asthma, blood pressure and so on. ACE can retain potassium.... Doppler for the veins is done for thrombosis (clot formation) / veins don't pulsate!  / If it is, it is a transmitted pulsation and the study should include arterial Doppler too. Take tarnishing speedy recovery God bless Good luck