I have been taking both T4 and T3 for the last 15 years as prescribed by my endocrinologist and find that this mixture is the only way to get the correct balance in my body. I have recently heard of people being denied T3 due to a massive price hike by the manufacturers. This is totally unacceptable. I think this was also exposed by The Times about a year ago. I would be interested to hear of other people's experiences and in particular if anyone has tried to get the NHS to re-negotiate the price of this drug.