This feeling cannot be achieved by cimetidine and other drugs. It is a very good policy to start treatment with drugs and simultaneously ensure asana practice . The effect is additive. The drugs can be tapered off as the condition improves. If the person is patient enough and the disease is in the early stages, yoga alone is sufficient.
Drugs work at the cellular level, inhibiting acid flow by antagonising some receptors.
The peripheral effects are controlled but the crux of the problem is not tackled. If medication is discontinued, it recurs. Asanas prevent this, as yoga works on the vagus nerve itself, reducing acid flow. This is healthier, especially in the long run. Yoga also quietens the entire system, inducing hibernation, so that all cellular responses are quietened.