Tadalista 20 mg contains tadalafil, which is sensitive to environmental conditions such as heat, moisture, and light. Improper storage can cause the medication to lose potency over time, reducing its effectiveness in treating erectile dysfunction.

If Tadalista 20 mg is stored in humid environments (like bathrooms) or exposed to direct sunlight, the active ingredient can degrade faster. Similarly, storing it at temperatures above 30°C (86°F) or in extremely cold conditions can compromise the tablet's stability. Over time, these conditions may cause the tablet to crumble, discolor, or develop a bitter taste, which are signs that the medication has deteriorated.

While tadalafil tablets generally have a shelf life of 2–3 years when stored properly in a cool, dry, and dark place, improper storage can reduce this significantly. Some studies and manufacturing guidelines suggest that exposure to heat or moisture for several weeks to months may start reducing the drug's effectiveness.

Using Tadalista 20 mg that has been improperly stored may lead to weaker erections or failure to respond during sexual activity. To ensure optimal efficacy, it should be stored in its original blister pack, away from moisture, sunlight, and heat sources, and kept out of reach of children. Always check the tablet for changes in color, smell, or texture before use, and consult a pharmacist if storage conditions were compromised.