A BBC Radio 4 investigation asks why the Ministry of Defence continues to use a drug that has been shown to cause psychosis, hallucinations, paranoia and confusion. It is alleged that, unlike other travellers who are able to make an informed choice and change their medication if they experience problems, some British service personnel in malarial regions have been given no choice and, in some cases, have been ignored when they reported side effects.

front side of suspected drug reactions report formOne of the programme's disturbing allegations is that reports on adverse drug reactions experienced by service personnel have not reached the Medicines Control Agency's Committee on Safety of Medicines, whose well known report form is readily available to all medical and nursing staff.

 This is from the BBC's programme details:

Lariam, also known by its generic name Mefloquine, is a highly effective anti-malarial drug, but in some people it can cause unpleasant neuropsychiatric reactions, problems with balance and vision, tinnitus and seizures. The drug manufacturer warns that, "Lariam may cause serious mental problems in some people". It also reports a link between Lariam and suicide.

In 2013, the US Food and Drug Administration applied the most serious kind of warning to the drug label, adding that the neurologic side effects may "persist or become permanent". US Special Forces soon banned the drug and launched an investigation into potential cases that may have been previously overlooked or misdiagnosed.

The wider US Army has "drastically reduced" its use of mefloquine, prescribing it only to soldiers who cannot tolerate the alternative anti-malarial drugs - as is also the case in Australia.

So why does the MOD continue to issue it to approximately 2,500 British Service Personnel each year? And is enough being done to ensure its safe use by British Armed Forces? We hear claims from ex-soldiers who felt compelled to use the drug and unable to report the side effects.

The Radio 4 programme, originally broadcast on 31 March and 6 April 2015, is currently available on BBC iPlayer at this link: