You are on an extensive list of medications. There are a few options in regards to your medications.
Do discuss it with your doctor also to ensure that any changes you would like to make meets with his approval. Unfortunately there are some medications that do not have any other med it its classification that you would be able to switch too.
The first med on your list is Prevacid which is a PPI, (proton pump inhibitor). There are a few others in this classification such as Protonix, Prilosec, Aciphex. The only one that has a generic is Prilosec which could save you quite a bit of money. It is called Omeprazole, which is the generic would cost 24.00 for 30 day supply and 63.00 for a 90 day supply.
Diovan which is a Angiotension Receptor Blocker does have some other medications in its classification as well which is Avapro, Atacand, Cozaar, and the Diovan. One point of interest here is that the Diovan you are taking also comes in Diovan HCT which is a combination with the Valsartan and Hydrochlorthiazide which is a diuretc. You could ask your doctor about possibly switching to this instead of using the Diovan and Lasix seperately. Diovan runs about 64. 00 for a 30 day, and 176.00 for a 90 day supply. The Diovan HCT costs 80.00 to 219.00 for a 30 to 90 day supply. Your lasix does come in a generic form for the cost of 9.00 for a 30 day supply of the 20 mg. dosage. You may think about getting a script for the 40 mg and splitting them. The cost for generic 40 mg is 9.00 for 100 tablets. This would give you a 180 day supply at just the 9.00. Or you can think about using the Diovan HCT which is a combination of the ARB/Diuretic. It would be cheaper for you to stay with using seperate than to use the combination form.
Now, with comparisons of other ARB's, the cheapest of all the medications in this classification is Avapro which at doses of 75mg to 300 mg the price is 47.00 to 70.00 for a 30 day supply and 130 to 170 for a 90 day supply. Which is very dependent on the dose that your doc would prescribe.
The Darvocet does come in a generic form which will save you about 40.00 than name brand. The average cost for non generic is about 47.00 for a 30 day supply and 130.00 for a 90 day supply. Generic form would cost you 15.00 for a 30 day supply or 32.00 for a once a day dosing. You would have to triple this amount for taking more than once. But you can see that the generic form will save you quite a bit of money.
Neurontin cost is very expensive. You could save your self alot of money using the generic form of Gabapentin as the previous post indicated.
Aricept and Omacor do not come in any other brands nor do they have any other medications in their classifications that you could possibly save any money on.
You can however discuss with your doctor about possibly switching to a combination pill such as Vytorin or Caduet but neither of these will treat the triglycerides as well as the Omacor.
Now as far as the Detrol LA, there are other medications in this same classification that may work for you. Another name is Ditropan which actually does have a generic form called Oxybutynin which comes in doses of 5, 10, 15 mg. Another form is in a patch that you apply which is called Oxytrol. Your Detrol LA runs from 108.00 to 304.00 (30-90 day supply). The generic Ditropan of Oxybutynin is a cost of 8.00 to 22.00 for a 30 to 90 day supply.
Your crestor is costing you anywhere from 100.00 to 550.00 for 30-90 supply. You may want to ask your doctor about possibly switching to Simvastin (generic for Zocor) this cost is about 69.00 to 200.00. But there again it will be up to your doctor if this will work for you.
The Avandia unfortunately does not come in generic form. The diabetes medications are very specific in how they work. Discuss it with your doctor about possibly switching to a cheaper medication. There are many oral agents out there and this would have to be determined by your doctor since he knows more about your medical history. sorry I can't quote you anything on this one.
You also take vitamins. My suggestion would be to check out the generic brands and compare prices. They can run from cheap to expensive depending on the brand. The store brands are not any different in how they work versus the name brand such as Centrum, One A Day, etc... It will require looking around to find the cheapest brands.
The Colace and Metamucil you take, you can actually reduce your cost by using Senna S because it has both properties that will do the same thing as your Colace and Metamucil. The cost is cheaper to buy just one product that buying both. Senna S can be bought over the counter, as well as the Colace and Metamucil. If you prefer to use the two than you need to look at using a generic colace. the cost difference can be a savings from 23.00 down to 8.00 depending on the brand. If you are using prescriptions for filling your vitamins and the stool softeners, look around the different stores in your area and compare prices. These can be purchased alot cheaper over the counter.
Other options also to lower your cholestorol is to do it by diet, and exercise and possibly your doctor would be able to lower your dosage amounts and help you feel better the natural way. It is recommended to not have more than 300 mg of cholestrol in your diet a day. Just by reading the labels on the foods you buy will help you determine how much cholestrol is in the foods you eat. It can be a real eye opener once you start reading labels. It was for me! Watching your trans fat intake also helps to lower cholestrol.
You also asked about which medications are essential for you, that really depends on your medical history and only your doctor can actually answer that question for you. I have not research your medications in respect to getting them from outside the US. I will try to cover that unless someone else does it first. Good luck.