The news weighed on shares in both Chugai and Roche. Tamiflu is considered one of the best defences against bird flu in humans and is in great demand as fears grow about the spread of the deadly virus.
The comments from Chugai come in response to weekend news reports that Japan's health ministry is investigating the deaths of two teenage boys who died in accidents linked to odd behaviour shortly after taking the drug.
Already a subscriber? Log in.
Win a prize this Mother's Day by subscribing to our annual plan now! T&C applies.
Cancel anytime. No ads. Auto-renewal. Unlimited access to the web and app. Personalised features. Members rewards.
Follow us on our official WhatsApp channel for breaking news alerts and key updates!