3. Nervousness and Restlessness Some dogs may exhibit signs of anxiety, nervousness, or hyperactivity when taking theophylline. This can be particularly troublesome for anxious dogs or those already predisposed to behavioral issues. Adjusting the dosage or switching to a different medication may help alleviate these side effects.
Active pharmaceutical ingredients (APIs) are the cornerstone of pharmaceuticals, responsible for the therapeutic effects of medications. While traditional APIs are well-defined and standardized, there exists a diverse category known as atypical active pharmaceutical ingredients (AAPIs). These substances offer unique properties and functionalities that can significantly enhance drug formulations and therapeutic outcomes.
1. Acid Addition For acidic water (pH < 7), acids such as sulfuric acid or hydrochloric acid can be added to increase the pH to acceptable levels. This method requires careful monitoring to avoid overshooting the neutral range.
Stabilizers are crucial for protecting plastics from degradation caused by exposure to heat, light, and oxygen. Without stabilizers, plastics can become brittle or discolored, resulting in diminished mechanical performance and shorter service life. UV stabilizers, for example, are essential for outdoor applications where exposure to sunlight can be detrimental. Metal stearates and chlorinated paraffins are often added to stave off thermal degradation during manufacturing processes, ensuring that the plastic maintains its integrity during production and usage.
6. Impact Modifiers To improve the toughness and impact resistance of certain plastics, impact modifiers are added. These additives help prevent the material from cracking or breaking under stress. For example, in the production of acrylonitrile-butadiene-styrene (ABS) plastics, impact modifiers enhance performance without significantly affecting other properties.