Unfortunately the weeks of extreme air pollution and different diet badly affected Craig, Mike and I while at Nainital. Jen got a cold/sinus infection but was otherwise fine thankfully as she had to sort out the rest of us. 
Craig was pretty unwell for a couple of days with diarrhoea and ended up going down the hill to a chemist shop with Jen to get antibiotics and vitamins. That was a quick walk down the path but a very exhausting climb back up. For him because he was unwell and had eaten practically nothing for a couple of days and for her being blocked up and having MUCH shorter legs. 
They found that you can buy prescription drugs over the counter without a prescription and extremely cheaply. They came back with antibiotics for Craig and I ( I had intestinal problems as well), sinus, cold/flu pills for Jen and I and cough lozenges for Mike, all for about $5. 
We ate very little. Had fluids and toast plus soup in the evening. It was bitterly cold so we were happy to stay in our rooms and rest.  We had organised a couple of sightseeing trips but deferred them until Thursday in the end. 
We all hunkered in our rooms on Monday and Tuesday hoping to go on one of our tours on Wednesday. It was not to be. I won’t describe the scene at breakfast but it was pretty grim. Mike ended up fainting and then vomiting and we were assisted by fellow guests who had medication and suggested a visit to the hospital was in order. I suspect the wife was a doctor. 

The hotel was excellent and organised the 4 of us to be taken to the hospital. I think it might have been more of a medical centre but was the local place for sickness. The whole place was about as far different from a hospital or medical centre in NZ as you could imagine. 
Our hotel man organised forms for us. The forms have numbers. You get seen by number. We waited downstairs, then we waited upstairs, then we waited downstairs in a different wing. Visiting the doctor in India is a communal affair. We had decided there was no way we’d allow an IV transfusion of electrolytes but that wasn’t even close to being on offer. 
We were eventually thrust into a room with a doctor, at the point we were prepared to return to the hotel. The doctor was still finishing up with a lady while we stood there, the nurse was also present and taking notes. The doctor didn’t have good English. He might have been Nepalese – in any event he had a short repertoire. He finished with the blood pressure check of the lady and then took our forms, the twenty or so other people just behind a curtain in the waiting room, at least 5 of them actually looking in at the curtain. 
He approved of Craig’s antibiotics purchased down the hill. He took Mike’s blood pressure (through his jersey), tapped his back, chest and stomach twice with a stethoscope (through his jersey) and decided (we think) Mike might have had altitude sickness and a sinus infection. Craig got the same treatment but I only got the stethoscope – again one tap to the back, chest and stomach through my jersey. There was no applause from the waiting room but they were no doubt happy we’d been sorted and would move on. A lady couldn’t wait for us so she thrust her way in and got a prescription filled out while I was being stethoscoped. We got additional medication prescribed though it comes in recycled newspaper bags and there are no dosage instructions. It was cheap and we exited glad we had nothing more difficult to diagnose.  
Craig and Jen got the medication and then we retreated back up the hill to the hotel. Mike was by this time feeling better and I was awful. Craig was positively perky. 
We sucked back electrolyte stuff and antibiotics and sinus pills and slept glad to have survived the morning.