4-substituted cyclohexanes substituted in the 1-position with quinazoline either directly or through a C
1
-C
4
alkyl, C
1
-C
4
alkenyl, C
1
-C
4
alkynyl, C
1
-C
4
alkoxy, amino, aminoC
1
-C
4
alkyl, hydroxyC
1
-C
4
alkyl, carbonyl, cycloC
3
-C
6
alkyl or aminocarbonyl chain are effective as NMDA NR2B antagonists useful for relieving pain.
4-substituted cyclohexanes substituted in the 1-position with imidazopyridine either directly or through a C
1
-C
4
alkyl, C
1
-C
4
alkenyl, C
1
-C
4
alkynyl, C
1
-C
4
alkoxy, amino, aminoC
1
-C
4
alkyl, hydroxyC
1
-C
4
alkyl, carbonyl, cycloC
3
-C
6
alkyl or aminocarbonyl chain are effective as NMDA NR2B antagonists useful for relieving pain.