Diltiazem is a calcium channel blocker that has a vasodilatory effect and delays conduction in the AV node of the heart.
Possible side effects: Swelling of the lymph nodes, vomiting, heartburn, diarrhoea, feeling of weakness, oedema.
Increase in liver enzymes gamma-GT and LDH, lymph node swelling, vomiting, heartburn, diarrhoea, SA block, feeling of weakness, oedema. Allergic skin symptoms, syncope, heart failure, insomnia, hallucinations and depressive moods as well as potency disorders are rare. Hyperglycaemia may occur in diabetics.
If you want to be sure that your cocaine really only contains cocaine and in what dose, you should have it chemically analysed.