First-half net profit declined 1 per cent to $28.3 million, compared with $28.6 million in the first half of its last financial year, when deferred tax charges of $11.7 million are excluded.
F&P Healthcare said it had derived approximately 53 per cent of its operating revenue in US dollars.
Daniell said the proportion had been 80 per cent about 15 years ago.
"It makes sense to be selling in US dollars to [just] the United States."
However, he said many of the distributors in smaller countries still wanted to use the greenback.
F&P Healthcare now sold its products in 120 nations, either directly or through distributors, Daniell said.
The company is ramping up production in its lower-cost Mexican manufacturing facility, which opened last year. More than 20 per cent of the firm's consumable products, such as face masks and tubes, are now made in the plant in the border city of Tijuana.
For the second half of its current financial year, F&P Healthcare had 89 per cent foreign exchange hedging cover for the greenback at about US70c.
The company said it had 86 per cent cover for the euro at around €48c.
The New Zealand dollar has averaged US79.44c against the greenback and €56.72c against the euro this year, and was trading at US74.41c and €55.26c at 3pm yesterday.
Morningstar analyst Andrew Lange said F&P Healthcare was showing strong underlying growth and had a stable outlook.
"For a fairly defensive investor it's looking like a solid company to get into," Lange said.
The company forecast full-year net profit to be in the range of $62 million to $67 million, up from $52.5 million last year.
F&P Healthcare shares, which have lost more than 20 per cent of their value this year, closed down 3c at $2.39 last night.