Milbemax Tablets for Small Cats and Kittens/Milbemax Tablets for Cats Contra-indications, warnings, etc Do not use the ‘tablets for Small cats and Kittens’ in cats of less than 6 weeks of age and/or weighing less than 0.5 kg Do not use the ‘tablets for Cats’ in cats weighing less than 2 kg. The product should not enter water courses as this may be dangerous for fish and other aquatic organisms. Pregnancy and lactation MILBEMAX can be used in breeding cats including pregnant and lactating queens.