Namenda made a big change in my husband too when he was put on it. His doctor also kept him on the aricept because studies have shown that using the two drugs together increases the time that they can keep their cognitive levels higher before the drugs alone would have stopped having an effect.
I do hope your husband is using both, if not maybe you can ask his doc about it and also if not maybe you can look up that research on the web and print it out to show him if he's not already aware of it.

My husband is in Namenda as well and it didn't seem to make any improvements but he did seem to stablize. But when the doctor added the Excelon patch I really noticed a big difference.

Yes, he is continuing the Aricept.

In the past week my husband has experienced several hallucinations, could it be the Namenda or is simply just another symptom?

I doubt it is the namenda, my husband also had a problem with severe hallucinations and we ended up needing to put him on risperidone. I know some people will say it does no good for people with Alzhiemers but the change in Neal after he started it was nothing short of a miracle and I know it definately saved my sanity.
When his hallucinations started he stopped sleeping and I was afraid to sleep because of what he was seeing, like thinking he was setting the neighbors house on fire by looking at it.
I don't know how severe your husbands problem is or how it's affecting your ability to handle daily life but don't wait to get help.

Georgia- Here is an example of what happened last night....

I awoke (about 2 am) to find my son (20) talking to him in the hallway outside our room. He was saying, "Go back to bed, Mom will help you." My husband was upset because he told me that, 'there were strange people running through our house" and he was afraid "they were going to hurt us." I said, "You are just dreaming, honey, no one is here." He was adamant that there were bad people in the house. So now I'm a bit tired today because he interrupted my sleep. So I guess I will contact his doctor and discuss it with him.

Actualy that thinking that there are strangers in the house or someone is trying to rob them seems to come up fairly often in dementia cases, wonder why that is?
It may be pretty common but it is also pretty disturbing for the caregiver/family and not getting enough sleep is a big problem for some of us. I don't know if I'm lucky or not, if my husband thought there were dangerous strangers in the house he would wake me up and tell me to go get them.
Do talk to your doctor, the proper meds will make both of you feel better. Can you imagine how it must feel to think people are out to get you and there is nothing you can do about it? Hugs to both of you.

My dad hallucinates a little too. He is always telling me the neighbors want to borrow his trailer. One day he said they borrowed his lawn mower. One day he said they called complaining that he was making too much noise -none of which was true. Millie

I just spoke with his neurologist and we both decided that the hallucinations are just part of the illness and we both agreed not to give him any new drugs at this time until I feel like the hallucinations are causing serious problems. We are both thinking that we want to reserve drugs for when he really needs them so that he doesn't doesn't become immune to them. He is sending a prescription for something to calm him on an 'as needed' basis.

Dear Deborah48,
My mom died of AD. My mom stopped walking in june 2008. The day she stopped walking she was on her 3rd day of not having any sleep at all! She insisted of going to the bathroom every 10 seconds. I mean walk out and walk right back in to the batchroom. I must have fallen asleep for maybe 3 minutes in the middle of the night. The next thing i heard was my mom screaming. She had fallen down. In the moring we notice that she would not move. And we are talking about a woman who in the first place had 16 kids, always had something to do. If it was not baking, it was washing clothes, ironing, washing dishes, etc. etc. She had suffered a stroke. My mom had a hard time adapting to not walking, she just had so much energy inside of her that it would drive her crazy. She would cry alot, wanted to die all the time, but most of all stay up all night. The Dr. gave us SERAQUEL It worked like magic for about 10 days. But hullicinations began. It allowed my mom to sleep at night. After that they gave us Atavan hullicinations got worse. My mom always saw people, animals crawling up, sometimes, she would scare us cuz she said "Look, you have a tarantula on your face", or "Look at all of those snakes". People with AD DO NOT, DO NOT comprehend when you tell them there is nothing there! Especially if u yell at them. The best thing i recommend is for u to change the subject and talk to them about the past. I know it is hard to do that in the middle of the night after your sleep is interrupted. But you have to, absolutley have to be patient with your love one.. Any one that is taking the responsabilty into caring for a love one with A.D. HAS to have the time, and most of all the patience for caring. Hullicinations are another symptoms that come with A.D. We learned to give my mom the tranquilizers only when we knew she was not gonna sleep or was getting fuzzy. There will be a time when drugs just wont work Deborah, so hang in there! XXXX TONS OF HUGS AND PRAYERS FOR YOU AND YOUR FAMILY!!

We put mom on Namenda and it made her verry ill she lost 12 lbs in a week. We had her in a foster care hoome because the bf dosent want to care for her at home. We tried aircept also and she had the same problem. The last medication made her be more into hallucinations and loosing more weight. We ended up with her in the hospital. In one week she went from going to a movie and dinner with us to diapers and us haveing to feed her every meal. She is now in a beautiful long term care facility. she is in the last stages of her disease.The dr explained to us that each different medication trial actually worssened her symptoms and we should have beeen advised that that can happen. A little information too late. Daily 3-4 people die. It is a horrible experience going there. I want her home. I can handle it, I thing she sacraficed for him when he was a baby now it is his turn to scrafice for her. I dont need to see people dying every day. it is making me very depressed.