My Mom Has Had A Slow-progressing Form Of Parkinsons For

My Mom has had a slow-progressing form of Parkinsons for about 20 years, responding well to Carbodopa. However, she is now having trouble swallowing, would you recommend liquid formula, or even injectable? She has just had a flu-like episode which took away her appetite, has probably had only half of her usual daily dose for the past two days, and it is really showing