You name a drug and they've probably tried it. Too long a list to give you but it includes morphine, methadone and even botox. Quite simply there is no known drug or combination of drugs which works on more than 50% suffers and then only gives temporary relief. All you can do is inform your doctor and ask if he can suggest anything else to try.
We all have stages where we do cry, it can relieve the pressure and help you so let it flow when you feel the need.
One thing I have found helps is to leave my hand soaking in lukewarm water.