(EN) Imidazolyl and pyridyl derivatives of phenyl substituted 1,4-dihydropyridines of formula (I), wherein Het is $g(a) or $g(b); A represents a direct linkage, -CH2-, CH2-CH2- or, when Het is $g(a), A may also represent -CH=CH-; R is hydrogen, halogen, C1-C3 alkyl or C1-C3 alkoxy; each of R3 and R4 is a C1-C3 alkyl group; one of R1 and R2 is a group -OR' wherein R' is a C1-C6 alkyl either unsubstituted or omega substituted by C1-C3 alkoxy or cyano, and the other is, independently, a) a group -OR'; b) a group $g(c); or c) a group -ORIV wherein RIV is hydrogen or a substituent selected from: (i), (ii), (iii), (iv), are useful as Thromboxane A2 (TxA2) Synthase inhibitors and as calcium antagonists.
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