Final answer:
The symptoms described indicate drug toxicity, which can occur in individuals taking theophylline for asthma.
Step-by-step explanation:
The symptoms you described - stomachache, tachycardia (rapid heart rate), and profuse sweating - are indicative of drug toxicity. These symptoms may occur in an individual taking theophylline, which is a medication commonly used to treat asthma. Theophylline is a bronchodilator that helps to open up the airways and relieve asthma symptoms. However, in some cases, it can cause side effects such as stomachache, increased heart rate, and excessive sweating.