Pink capsules: cats under 2.5 kg. Green capsules: 2.5–4 kg. Blue capsules: over 4 kg. Always choose based on current body weight and adjust as weight increases during treatment.

Give on an empty stomach or in a small treat, then full meal 30+ minutes later. This improves absorption. Injectable treatment: food timing is irrelevant as it bypasses digestion entirely.

Store at ambient temperature below 40°C, away from direct sunlight. Stable for up to 2 years under these conditions. Refrigeration is not required but can extend shelf life.

Place the capsule as far back on the tongue as possible, then gently hold the mouth closed and stroke the throat downward to trigger swallowing. A pill popper/gun tool makes this easier and reduces the chance of being bitten. Offering a small treat immediately after helps create a positive association. If your cat consistently refuses capsules, switching to injections is the most reliable alternative.

Oral GS-441524 is absorbed at approximately 40–50% efficiency compared to subcutaneous injection. To achieve equivalent therapeutic blood levels, the oral dose needs to account for this absorption gap. This is why our capsule concentrations are formulated higher than the equivalent injectable dose — it is not an error. Never reduce the capsule dose based on injectable dosing charts.