Thank you for your response. In Europe there’s a new medication on the market since September. It’s called Elvanse (also known as Samexid, Tyvense, Venvanse, and Vyvanse), a lisdexamfetamine which works for up to 12 hours. My son uses this as of last week. It immediately worked like a charm on his speech and word finding problems. It’s great to witness him react directly and on the same level as his peers. This really helps him socially. Perhaps it might benefit others with the same problem too, so I thought I should share this with you.