Suggest Treatment For Constipation, Excessive Sleeping And Lightheadedness

I ve been constipated now for over two weeks. I ve noticed that it has been slowly building up to this point. Since I ve been taking different medications. Some meds I ve been on before or now for a long time so I know it is not those meds. Also I ve had no energy and have been sleeping a lot which I m not use to. I feel very week. And I get light headed when I stand and also when I m just walking across the room sometimes. Light headedness only happens sometimes. I ve all been hot natured but lately I ve been cold and cover up with blankets. The only thing I can think of is the sugar meds that are making me this way cause since I ve been on them is when things started feeling like I m going down. Today I ve not taken the (METFORMIN HCL 1,000 MG TAB) and I ve been up and moving around. Copuld this medacation be whats going on. Or maybe the mix of all meds. Here is a list of meds. OXYCODONE 15MG* IMMEDIATE REL TABS Which I take four a day but have been taking them for a long time. I know it s not them. MORPHINE SULFATE 30MG ER TABS (12H) I take two a day of these. Which I will not be taken anymore: for they make me itchy and have caused me to scracth til I ve bled. NAPROXEN 500MG TABLETS I am pose to take 2 a day but I ve taken them before and they really don t help and I m on 325 mg aspirin so a nother reason I perfer not to take. LISINOPRIL 20MG TABLETS I m on one a day but sometimes I need to take one later in the day. CYCLOBENZAPRINE 10MG TABLETS This med I ve been on for years. I know these ain t bothering but only helping. INDOMETHACIN 50MG CAPSULES I know this med can be dangerous and they have it to take three a day, but I only take one when I feel my gout starting up. So I may take one a every couple of days. Then it may be a couple of months before I take another one. GABAPENTIN 400MG CAPSULES Now this med they have it to take two of them four times a day. But I dont take it like that right now cause I was feeling a little funny so now it s one four times a day. I ve been on these med for 8 months now. AMITRIPTYLINE 25MG TABLETS This med I only take half of one sometimes when I m not sleepy and know I need rest. RANITIDINE 300MG TABLETS Now this med I was on before because I can t eat red meats or pork with out it going straight thru me. But before had I was only taken 150mg every two days. Now they have me taking them every night. (METFORMIN HCL 1,000 MG TAB) I question these medacation. This med they have me on twice a day. GLIPIZIDE 10MG TABLETS This med I ve only been on for a month, but things started before taking this. FUROSEMIDE 20MG TABLETS These med is once a day but these med I also only take when needed. Mainly when my left knee starts swelling or I feel a slushiness in my chest. AMOXICILLIN 500MG CAPSULES This is three times a day, but I ve taken before. No problems.