No, diesel engines don't have ignition coil as they work on compression ignition and not on spark ignition as in diesel engines. Glow plugs used in diesel are like small electric heaters which use the mechanism of heating due to resistance during electrification.
Clarithromycin is another antibiotic treatment for walking pneumonia. It is more powerful than even erythromycin as it is also used to help treat HIV/AIDS patients. It works by interfering with the protein synthesis of bacteria, which prevents them from growing further. It is given in the form of tablets or a gel.
One of the best cure for food coma is to go for walk though it may not be an activity of choice after a heavy meal but some brisk physical activity can help cure food coma. Drinking a cup of coffee can also help in curing food coma as aids in boosting the sympathetic nervous system.