Long before immodium. 1959 Aden to Akrotiri in a PR7. Nav not feeling too good so hopped along to sick quarters who gave him a quart of kaolin and morphia. Couple of hefty swigs and off we went. Luckily navigation not too hard. West to Nasser's Rock, north to El Adem then right a bit to Cyprus.
Empty bottle when we arrived. Would swear his blue eyes were still brown a week later.