Common side effects from huffing kittens:
restlessness, insomnia, anxiety, headache, asthenia, flu-like symptoms, fever, nausea, diarrhea, anorexia, dry mouth, constipation, flatulence, dyspepsia, vomiting, somnolence, yawn, abnormal vision, sweating, trembling, weakness, weight loss, skin rash, delayed ejaculation in men, decrease in sex drive, and there have been reports of subsequent weight gain.