I have personal experience of the dissolvable tablets vs the normal ones and I def noticed the dissolvable ones made me sleep better...
It may be a case of taking the normal ones earlier, but def don't drink after you've taken them I used to get terrible vertigo ...
I would say speak to your gp but I know you don't won't to, it's probably a mistake on your prescription .. As the others have said, speak to your pharmacist first... It's not right that your gp should be dismissive as these things can have a real impact...