How to Manage Dizziness & GI Issues in ATTRv Amyloidosis

Living with ATTRv V30M amyloidosis often means dealing with autonomic nervous system damage, which controls automatic body functions like blood pressure and digestion ^[1][2]. This damage can cause two very disruptive symptoms: orthostatic hypotension (a sudden drop in blood pressure when standing, causing dizziness) and gastrointestinal (GI) dysmotility (slowed or erratic digestion, causing diarrhea, constipation, or nausea) ^[3][4]. Managing these issues requires a combination of daily lifestyle adjustments and targeted medications, closely supervised by a neurologist and a gastroenterologist ^[4][5].

Controlling Orthostatic Hypotension (Dizziness)

Orthostatic hypotension occurs when the damaged nerves cannot properly signal your blood vessels to tighten when you stand up ^[3]. Treatment focuses on increasing blood volume and helping vessels constrict, starting with lifestyle changes before moving to medications ^[6][7].

Daily Lifestyle and Non-Pharmacological Habits

• Hydration and Salt: Increasing your daily water and salt intake helps boost your overall blood volume. Ask your doctor for specific target numbers (e.g., how many liters of water and grams of salt per day). This must be carefully monitored if you have amyloid-related heart or kidney issues ^[7][8].
• Compression Garments: Using physical compression helps push blood from your lower body back up to your heart and brain. Research shows that abdominal binders (tight bands around your stomach) and waist-high compression tights are highly effective for managing blood pressure upon standing ^[9][10].
• Avoiding Triggers: Stand up slowly, especially in the morning or after large meals. It is also important to review your current medications with your doctor to remove any that might be accidentally lowering your blood pressure ^[3].

Pharmacological Options (Medications)

If lifestyle changes are not enough, your neurologist may prescribe medications to help raise your standing blood pressure ^[11][7]:

• Midodrine and Droxidopa: These drugs work by stimulating your blood vessels to constrict, preventing blood from pooling in your legs ^[2][3].
• Fludrocortisone: This steroid medication helps your kidneys retain salt and water, expanding your blood volume ^[7]. Caution: Because it causes fluid retention, fludrocortisone must be used with extreme caution or avoided entirely in patients with amyloid-related heart failure ^[7].

Important Safety Note: Medications that raise standing blood pressure can also cause supine hypertension (dangerously high blood pressure when lying down) ^[12]. Your care team will help you find a dosing schedule that avoids taking these medications right before bed. A highly effective lifestyle tip is to sleep with the head of your bed elevated (such as with a wedge pillow), which helps prevent supine hypertension at night and reduces morning dizziness ^[12].

Managing Gastrointestinal (GI) Dysmotility

The buildup of amyloid proteins in the nerves of the gut can disrupt normal digestive movements, leading to unpredictable cycles of severe diarrhea, constipation, or early fullness ^[4]. Because the GI tract is complex, working with a gastroenterologist and a specialized registered dietitian is essential for timely and effective relief ^[4][5].

Dietary Modifications

Adjusting how and what you eat can significantly ease the burden on your digestive system ^[4]:

• Eat smaller, more frequent meals rather than three large ones to help your stomach empty more easily.
• Keep a food diary to identify trigger foods that worsen diarrhea or bloating.
• Ensure you are absorbing enough fluids and nutrients, especially during bouts of severe diarrhea.

Pharmacological Options (Medications)

Because symptoms can “see-saw” unpredictably between diarrhea and constipation, treatments must be carefully balanced to avoid triggering the opposite problem. Your gastroenterologist can prescribe several types of medications ^[4]:

• Anti-diarrheals: Medications like loperamide can slow down gut transit time. However, use them cautiously to avoid triggering severe constipation. For some patients, diarrhea is linked to bile acid malabsorption, which can be effectively treated with bile acid sequestrants (such as cholestyramine or colesevelam) ^[13].
• Prokinetic Agents: If you suffer from constipation, nausea, or a stomach that empties too slowly (gastroparesis), prokinetic medications (like metoclopramide or domperidone) can be used to stimulate the stomach and intestines to move food along more efficiently ^[4].

Finally, while managing symptoms is vital for your daily quality of life, treating the underlying disease with disease-modifying therapies (like patisiran or vutrisiran) can help slow or stop further nerve damage ^[14][15].